Police are investigating the shooting deaths of four people Wednesday, including a toddler, inside a Brooklyn apartment.

"My baby is gone. She's gone. She's gone. She's not coming back. She's not coming back," the mother of the toddler wept Wednesday evening at a small prayer vigil for her daughter and the other victims of the shooting.

Investigators with the 73rd Precinct say officers received a 911 call at 5 a.m. at Riverdale Towers on Thatford Avenue in Brownsville.

Police say when they entered the fourth-floor apartment, they found the bodies of three adult males and a 1-year-old female, all with apparent gunshot wounds.

Investigators say all of the victims were pronounced dead at the scene.

They were identified as 1-year-old Laylay Briggs, her father 27-year-old Terrance Briggs, 16-year-old Loyd Drain III, and 57-year-old Loyd Drain Jr.

Police say Terrance Briggs and Laylay Briggs were found in one bedroom.

Drain Jr. was found dead in a bathroom, and Drain III was found deceased in another bedroom, police say.

Police believe they are all related.

A 53-year-old woman who lives in the home made the discovery and called 911, police say.

At the scene, police recovered a gun, bullets, and shell cases.

No arrests have been made, and the incident is under investigation.

Investigators believe Terrance Briggs killed his family and then turned the gun on himself.

"I could tell you, he was one of the best football players we ever had, but, like any young man, he had some troubles," said Christopher Legree, a family friend and the high school coach and mentor of Terrance Briggs.

Police said there were a lot of domestic violence calls to the home for the entire family.

Neighbors are still trying to come to grips with what happened, one saying they seemed happy together when she saw them Saturday.

Police said it is still not clear what led to their deaths.