A gun was found inside a student’s locker at Robinson Secondary School in Fairfax County.

Parents were told Wednesday that the weapon was confiscated and that police had been notified, WTOP reports. The student has been identified, and criminal and administrative investigations are underway.

“We recognize the danger associated with any weapon in the school. While we regard this as an isolated incident, please know that any violations that jeopardize the safety of students at Robinson will result in severe consequences as outlined in the Student Rights & Responsibilities document,” the letter to parents said.

Administrators did not say in the letter what led them to search the student’s locker.