Keren Jemima Dunaway González, a teenage Honduran Aids activist who was abducted in the city of San Pedro Sula on Tuesday has been released.

Three unidentified men grabbed Keren, 18, with her mother near the offices of the Llaves Foundation, which helps children with AIDS. González, the head of Llaves, was freed, but Keren remains captive.

Police said her captors had asked for ransom but had released her after her mother assured them the family had no money.

San Pedro Sula remains one of the most violent cities in the world and has the world's highest homicide rate at 187 per 100,000 inhabitants in 2014.