St. Louis ( KSDK ) -- St. Louis police still don't know the identity of a young adult male who was shot to death Monday night at Darby and Natural Bridge.

Residents in the neighborhood had summoned police because they heard numerous gunshots fired shortly after 7 p.m.

The victim is described only as a black man in his late teens or early 20's. He'd been shot once in the back. His body was found on the sidewalk.

No one is in custody.