AP PHOTOS: Day 12, humanitarian crisis in Ukraine deepens
A Ukrainian police officer runs while holding a child as the artillery echoes nearby, while fleeing Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
Ukrainian women sit inside a van as artillery echoes nearby, as people flee Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A Ukrainian serviceman monitors a checkpoint from behind sandbags on a main road in Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Vadim Ghirda)
A woman holding a child cries after fleeing from Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
A volunteer of the Ukrainian Territorial Defense Forces inspects a damaged military vehicle in the outskirts Kharkiv, Ukraine’s second-largest city, Monday, March 7, 2022. (AP Photo/Andrew Marienko)
A Ukrainian police officer helps people as artillery echoes nearby while fleeing Irpin in the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A woman feeds her daughter after fleeing Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
Ukrainian civilians receive weapons training, in the outskirts of Lviv, western Ukraine, Monday, March 7, 2022. (AP Photo/Bernat Armangue)
A woman wraps herself in a blanket to keep warm as she waits in a crowd of refugees after fleeing from Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Markus Schreiber)
People holding their children struggle to get on a train to Lviv at the Kyiv station, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A worker shifts furniture to make room for a painting of Vladimir Lenin, removed from a museum exhibit at the train station in Zahony, Hungary, Monday, March 7, 2022. (AP Photo/Darko Vojinovic)
A train with refugees fleeing Ukraine crosses the border in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
A refugee wrapped in a blanket fleeing the war from neighboring Ukraine arrives at the border crossing in Palanca, Moldova, Monday, March 7, 2022. (AP Photo/Sergei Grits)
People cook outdoors for Ukrainian servicemen and civil defense members serving in Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Vadim Ghirda)
A Ukrainian volunteer Oleksandr Osetynskyi, 44 holds a Ukrainian flag and directs refugees after fleeing from Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
Ukrainian soldiers and militiamen carry a woman in a wheelchair as the artillery echoes nearby, while people flee Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
People cross an improvised path under a destroyed bridge while fleeing the town of Irpin close to Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Efrem Lukatsky)
Ukrainian civilians receive weapons training, in the outskirts of Lviv, western Ukraine, Monday, March 7, 2022. (AP Photo/Bernat Armangue)
A Ukrainian soldier covers himself as the artillery echoes nearby, while people flee Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A firefighter holds the baby of a refugee fleeing the conflict from neighboring Ukraine at the Romanian-Ukrainian border, in Siret, Romania, Monday, March 7, 2022. (AP Photo/Andreea Alexandru)
A Ukrainian police officer runs while holding a child as the artillery echoes nearby, while fleeing Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A Ukrainian police officer runs while holding a child as the artillery echoes nearby, while fleeing Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
Ukrainian women sit inside a van as artillery echoes nearby, as people flee Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
Ukrainian women sit inside a van as artillery echoes nearby, as people flee Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A Ukrainian serviceman monitors a checkpoint from behind sandbags on a main road in Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Vadim Ghirda)
A Ukrainian serviceman monitors a checkpoint from behind sandbags on a main road in Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Vadim Ghirda)
A woman holding a child cries after fleeing from Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
A woman holding a child cries after fleeing from Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
A volunteer of the Ukrainian Territorial Defense Forces inspects a damaged military vehicle in the outskirts Kharkiv, Ukraine’s second-largest city, Monday, March 7, 2022. (AP Photo/Andrew Marienko)
A volunteer of the Ukrainian Territorial Defense Forces inspects a damaged military vehicle in the outskirts Kharkiv, Ukraine’s second-largest city, Monday, March 7, 2022. (AP Photo/Andrew Marienko)
A Ukrainian police officer helps people as artillery echoes nearby while fleeing Irpin in the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A Ukrainian police officer helps people as artillery echoes nearby while fleeing Irpin in the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A woman feeds her daughter after fleeing Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
A woman feeds her daughter after fleeing Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
Ukrainian civilians receive weapons training, in the outskirts of Lviv, western Ukraine, Monday, March 7, 2022. (AP Photo/Bernat Armangue)
Ukrainian civilians receive weapons training, in the outskirts of Lviv, western Ukraine, Monday, March 7, 2022. (AP Photo/Bernat Armangue)
A woman wraps herself in a blanket to keep warm as she waits in a crowd of refugees after fleeing from Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Markus Schreiber)
A woman wraps herself in a blanket to keep warm as she waits in a crowd of refugees after fleeing from Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Markus Schreiber)
People holding their children struggle to get on a train to Lviv at the Kyiv station, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
People holding their children struggle to get on a train to Lviv at the Kyiv station, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A worker shifts furniture to make room for a painting of Vladimir Lenin, removed from a museum exhibit at the train station in Zahony, Hungary, Monday, March 7, 2022. (AP Photo/Darko Vojinovic)
A worker shifts furniture to make room for a painting of Vladimir Lenin, removed from a museum exhibit at the train station in Zahony, Hungary, Monday, March 7, 2022. (AP Photo/Darko Vojinovic)
A train with refugees fleeing Ukraine crosses the border in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
A train with refugees fleeing Ukraine crosses the border in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
A refugee wrapped in a blanket fleeing the war from neighboring Ukraine arrives at the border crossing in Palanca, Moldova, Monday, March 7, 2022. (AP Photo/Sergei Grits)
A refugee wrapped in a blanket fleeing the war from neighboring Ukraine arrives at the border crossing in Palanca, Moldova, Monday, March 7, 2022. (AP Photo/Sergei Grits)
People cook outdoors for Ukrainian servicemen and civil defense members serving in Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Vadim Ghirda)
People cook outdoors for Ukrainian servicemen and civil defense members serving in Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Vadim Ghirda)
A Ukrainian volunteer Oleksandr Osetynskyi, 44 holds a Ukrainian flag and directs refugees after fleeing from Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
A Ukrainian volunteer Oleksandr Osetynskyi, 44 holds a Ukrainian flag and directs refugees after fleeing from Ukraine and arriving at the border crossing in Medyka, Poland, Monday, March 7, 2022. (AP Photo/Visar Kryeziu)
Ukrainian soldiers and militiamen carry a woman in a wheelchair as the artillery echoes nearby, while people flee Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
Ukrainian soldiers and militiamen carry a woman in a wheelchair as the artillery echoes nearby, while people flee Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
People cross an improvised path under a destroyed bridge while fleeing the town of Irpin close to Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Efrem Lukatsky)
People cross an improvised path under a destroyed bridge while fleeing the town of Irpin close to Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Efrem Lukatsky)
Ukrainian civilians receive weapons training, in the outskirts of Lviv, western Ukraine, Monday, March 7, 2022. (AP Photo/Bernat Armangue)
Ukrainian civilians receive weapons training, in the outskirts of Lviv, western Ukraine, Monday, March 7, 2022. (AP Photo/Bernat Armangue)
A Ukrainian soldier covers himself as the artillery echoes nearby, while people flee Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A Ukrainian soldier covers himself as the artillery echoes nearby, while people flee Irpin on the outskirts of Kyiv, Ukraine, Monday, March 7, 2022. (AP Photo/Emilio Morenatti)
A firefighter holds the baby of a refugee fleeing the conflict from neighboring Ukraine at the Romanian-Ukrainian border, in Siret, Romania, Monday, March 7, 2022. (AP Photo/Andreea Alexandru)
A firefighter holds the baby of a refugee fleeing the conflict from neighboring Ukraine at the Romanian-Ukrainian border, in Siret, Romania, Monday, March 7, 2022. (AP Photo/Andreea Alexandru)
The humanitarian crisis in Ukraine is deepening with food, water and medicine growing increasingly scarce as Russian forces intensify their shelling.
In the capital, Kyiv, soldiers and volunteers have built hundreds of checkpoints to protect the city of nearly 4 million, often using sandbags, stacked tires and spiked cables.
“Every house, every street, every checkpoint, we will fight to the death if necessary,” said Mayor Vitali Klitschko.
As Ukrainians attempted to flee Irpin on the outskirts of Kyiv, a Ukrainian police officer could be seen running while holding on to a child as the sound of artillery echoed nearby. The invasion has sent 1.7 million people fleeing Ukraine.
Ukrainian officials accused Moscow of resorting to “medieval siege” tactics in places.
A third round of talks between the two sides Monday ended with a top Ukrainian official saying there had been minor, unspecified progress toward establishing safe corridors that would allow civilians to escape the fighting. Russia’s top negotiator says he expects those corridors to finally start functioning Tuesday.