The Administration for Children Services says it is involved in the homicide investigation of a 1-year-old baby boy's death in Brownsville.

ACS also says it has taken action to secure the safety of another child in the home.

The 1-year-old boy’s death in Brownsville has been ruled a homicide, according to the city’s medical examiner.

Officials confirmed Monday that the baby, Anthony Casey, died from blunt force injuries to his torso after being found unresponsive inside his family’s apartment on Newport Street Friday evening.

Sources close to the investigation told News 12 that when police arrived, the child was being carried outside by his mother — unresponsive. First responders tried CPR and rushed him to Brookdale Hospital, but doctors pronounced him dead less than an hour later.

According to those same sources, the mother told detectives that the baby had seemed fine earlier in the day but had diarrhea the day before. They said he went down for a nap that afternoon, and when they checked on him about an hour later, he wasn’t breathing. The mother and her boyfriend told investigators they both tried CPR before calling 911.

At first, doctors said they didn’t see any clear signs of injury, but the medical examiner’s autopsy later found trauma to the baby’s stomach.

Detectives are still working to determine how the child was hurt and who may be responsible. So far, no arrests have been made.

Neighbors say the tragedy has left the building stunned.

“I saw a lot of police officers here on Friday…I’m more shocked than anything else because this doesn’t really happen inside this building,” said Millie, who lives nearby.

Other neighbors like Kieron say they're concerned for other children's safety in the building.

“We don’t know what happens in the building, but I am scared for the kids, all the kids because we have a lot of kids running around in this building," said Kieron.