A school resource officer accidentally discharged his service weapon Tuesday morning at a middle school in Alexandria, Va., police said.

No one was injured in the incident.

It happened around 9:10 a.m. at George Washington Middle School in the 1000 block of Mount Vernon Avenue.

Alexandria police said in a statement that the officer discharged his weapon inside his office at the middle school. The officer contacted his supervisor and school staff.

Officials with the police department said in a statement that “all students and staff are safe and classes continued as normal.”

Authorities also said the school resource office is a five-year veteran of the Alexandria Police Department.

An investigation is underway into the incident. Officials said the officer has “been placed on routine administrative leave pending the outcome of the investigation.”