Eleven people were taken to the hospital after reports of a stabbing and a riot at the Horizon Juvenile Center in Melrose.
Citizen App video shows police officers swarming the Bronx juvenile detention center.
The FDNY said the call came in just before 5 p.m. Sunday.
What led up to the violence remains under investigation.
ACS released a statement saying, “The situation at Horizon Juvenile Center has been resolved and the facility is now secured. The safety and security of young people and staff in our secure detention facilities is our top priority.”