STOCKHOLM (AP) — The agent of former 1,500-meter world champion Abeba Aregawi says the Swedish runner's "B'' sample has confirmed she tested positive for meldonium.

Aregawi was suspended last month by the Swedish athletics federation. Her agent, Jos Hermens, told Swedish broadcaster SVT on Wednesday the "B'' sample showed up positive.

Hermens said Aregawi, who was born in Ethiopia but now represents Sweden, was cooperating with investigators from the International Association of Athletics Federations.

He said she took the medicine, which was banned on Jan. 1, thinking it was a vitamin supplement.

Hermens said "she feels really sorry for all the people that she has let down in Sweden."