Portland police trying to identify 3 young children abandoned in shed

(CBS/AP) PORTLAND, Ore. - Portland police are trying to solve the mystery of two young children and an infant who were found abandoned in a shed.

Police responded Thursday after a man reported hearing children's voices coming from a shed behind his southeast Portland, Ore. property. Officers found a boy and a girl, both believed to be under the age of 3, and an infant girl between eight and 15 months old.

Lt. Robert King says homeless people in the area told officers that an unidentified woman dropped the children off the night before.

It's not know whether the children are siblings.

All three were taken into protective custody by the Department of Human Services, according to CBS affiliate KOIN. They have yet to be identified.