Three students at P.S. 169 were arrested yesterday after one allegedly threatened another student with a loaded gun, police said.

According to an NYPD spokesperson, police got a call from the Robert F. Kennedy school on the Upper East Side just before 2 p.m., during which a school staff member said there was a student with a handgun. When the police arrived, they found three students—a 13-year-old, a 14-year-old, and a 15-year-old, all male—in an administrative office. They were all taken into custody.

The investigation so far has revealed that the 13-year-old allegedly pointed the gun at another student (reportedly a 12-year-old girl), but the gun itself was discovered in the jacket pocket of the 15-year-old. The 14-year-old was allegedly carrying a box of ammunition in his jacket, police said.

All three were charged with criminal possession of a weapon in varying degrees, and the 13-year-old was also charged with menacing in the second degree. They'll go to Family Court, where they'll be treated as juveniles.

P.S. 169 has students in kindergarten through twelfth grade. Miguel Gonzalez, who has a son in first grade at the school, told the Daily News that he wasn't immediately informed about the incident yesterday afternoon.

"I'm very concerned for my son's safety, for everyone's safety," he told the tabloid. "I have a lot of questions."

The city's Department of Education said it is working with the NYPD on the investigation, and that "nothing is more important than the safety of all students and staff and there is zero tolerance for weapons of any kind...Students and staff are safe and no injuries were sustained. Parents will be notified and we are providing ongoing supports to the school community."

This is the fourth time in three weeks that a student has been found bringing a gun to a New York City school. On March 23rd, a 14-year-old boy was arrested after bringing an unloaded 9mm handgun to M.S. 61 in Brooklyn. On March 17th, a 15-year-old student at York Early College Academy in Queens was arrested after threatening another student with a loaded gun. And just the day before that, an 11-year-old student at P.S. 40 in Queens flashed a loaded gun at his classmates on March 16th, leading to the arrest of his grandfather after police alleged the gun had been taken from his home.