Police are investigating the death of a one-year-old boy in Brownsville as a homicide after officers found him unresponsive inside his family’s apartment.

Investigators say the baby, Anthony Casey, was discovered Friday evening inside a building on Newport Street. He was rushed to Brookdale Hospital, but doctors couldn’t save him.

Sources tell News 12 that an autopsy report later revealed signs of trauma to the child’s stomach. The source also says the baby’s parent has denied any involvement in his death.

Neighbors in the building told News 12 they were stunned by what happened.

“That’s really sad, I mean for any child — any child harmed is very sad,” one neighbor said, asking not to be shown on camera.

No one has been arrested, and detectives spent the weekend going door to door speaking with residents as they try to piece together what happened during the final hours of Anthony’s life.