ERIE, Pa. (AP) — One student was injured in a shooting at a school in northwestern Pennsylvania, but the person’s injuries weren’t life-threatening, authorities said.

Erie city and school officials said shortly before 10 a.m. Tuesday that police had been called to Erie High School where the city said “a single individual” was shot. Officials said that person was in good condition and had been taken to a hospital.

Deputy Chief Mike Nolan of the Erie police department said the injured person was a student. He said it was unclear how many shots were fired and declined comment on what type of firearm was involved and whether it was recovered.

State police said they were assisting with the investigation and a shooter “has fled the school.” There was no further information about the suspect.

Police reported that they had secured the high school and asked people to avoid the area.

“The school is locked down, and students are safe,” the city said in a Twitter post.

Erie Public Schools reported that the building was “on hard lockdown” and officials were coordinating with police on campus. Officials said “evacuation by orderly dismissal” would take place as soon as police cleared the district to begin that process, and also asked people to stay away from the area.

Officials said the school doesn’t have metal detectors. The Erie Education Association, which represents school faculty and staff, said it had for years called for safety improvements but “each time, we’re told, ‘it will take time, we’re working on it.'”

“We will not stand by one day more until the safety of our students and staff is properly addressed,” the organization said in a statement, WICU-TV reported.

Mayor Joe Schember called the shooting “very saddening,” adding that “schools should be safe places where children learn and grow.”