TIANJIN, China (AP) — Rescuers have pulled a survivor from an industrial zone about 32 hours after it was devastated by huge blasts in China's Tianjin port.

Meanwhile, authorities are moving gingerly forward in dealing with a fire still smoldering amid potentially dangerous chemicals.

The two explosions late Wednesday killed at least 50 people and injured hundreds. They originated in shipping containers and struck a mostly nonresidential warehouse district. The death toll included a dozen firefighters sent in after the first blast, and would have been much higher in a populated area.

The official Xinhua News agency said one person was rescued from the neighborhood about 7 a.m. on Friday.

It gave no details of the rescue and it was not immediately clear if the person had been trapped under debris since Wednesday night.