A 12-year-old male student stabbed a 13-year-old male student at Lindenhurst Middle School this afternoon, Suffolk police say.

The incident was reported to police at 12:30 p.m.

The injured student was airlifted to Stony Brook University Hospital, where Suffolk County Police Deputy Inspector Sean Beran said he is in critical but stable condition.

"He lost a lot of blood," Beran said. "The wound was up on his leg near his groin where there are a lot of arteries and stuff up there."

The student accused in the stabbing has been charged with juvenile delinquency.

The school was locked down for nearly two hours after the stabbing.

News 12 was on the scene as parents were picking up their children. Some didn't know what happened until their children told them.

"He just said that they're locked in the classroom and that someone got stabbed in the hallway," said Mario Leguizanon, of Lindenhurst. "That there was a fight in the hallway and one thing led to another and a person was stabbed.

Other parents say their children weren't aware of what happened and were panicking inside their classrooms.

"She just said something happened and she didn't know what was going on," said Sara Cruz, of Lindenhurst. "A lot of crying on the phone. She didn't really say much - I was just trying to calm her down."

Seventh grader Javier Porotl says he saw the fight that led to the stabbing and was scared. He said he feels like "school is for safety," but that it's not always safe.

The superintendent of Lindenhurst schools released a statement to the community, which read in part,

"At approximately 12:30 p.m. this afternoon, there was an altercation involving a weapon (knife) between two students in a hallway at Lindenhurst Middle School. The building immediately went into lockdown and the Suffolk County Police Department was contacted. The individual responsible for the assault has been apprehended and is currently in police custody. Emergency responders have arrived on site and are treating the injured student."

The statement also said that the building would remain in lockdown until further notice, and that no one would not be allowed to leave or enter the school building. It assured parents that the students were in their classrooms and safe and that the incident was isolated.

The identities of the children involved have not been released due to their ages.