The family says the children were playing near the home’s backyard and close to a set of train tracks.
Witnesses report seeing the 12-year-old girl run away from the area bleeding and naked.
An aunt told The New York Daily News 9-year-old Martin Cobb was “hit in the head with a brick and killed."
The girl first told cops she was grabbed by a white man with “scraggly facial hair.” It was later learned the real bad guy threatened her unless she lied to authorities.
WWBT reports cops gathered enough information to issue an arrest warrant for a black teenage boy.
Family members said “nobody expects something like this to happen to the babies."
Neighbor Markeita Boyd told WRIC "this is a neighborhood that has been torn and stricken and actually destroyed.My heart hurts tonight."
Relatives say the girl is in the hospital and expected to recover from her physical wounds.