The victim, who officials have not yet identified, suffered a “major injury” in which one of his legs was partially amputated shortly before 11 a.m., an FDNY spokesman told TIME. The injured teenager is in stable condition.
The fire department only said the incident was “related to some sort of explosion.” NYPD spokeswoman Sgt. Jessica McRorie said it is still under investigation and that the bomb squad was one of the units looking into it.
A portion of the popular park was closed off Sunday after the blast. John Murphy, a witness visiting the city from Connecticut, told the Associated Press that the victim’s left leg was “severely damaged, all bone and muscle.”