A high school in Chelsea went on lockdown Friday and several students were treated by emergency responders after an incident with an intruder.
Shortly after 1 p.m. Friday, police say a 24-year-old man, believed to be a former student, entered Liberty High School.
Police say the man spoke with a school safety officer and then turned around and grabbed a fire extinguisher and sprayed the safety officer.
According to police, the man then ran to the fifth floor, where he was apprehended by a number of other officers.
The school went into lockdown for about 10 minutes.
"All the people that were involved today are stable," said FDNY Deputy Chief Anthony Degennaro. "Ten of them were transported to the hospital. Seven refused aid. A total of 17 were seen by the city resources today. At this time, NYPD is going to do a further investigation."
All of the students at Liberty High School were taken to the Manhattan Business Academy down the street for the rest of the school day.
Police say the man is at Bellevue Hospital for a psychiatric evaluation and will likely be charged once he's out.