A Haledon police officer was seriously injured in an accidental shooting at the Passaic County Police Academy Shooting Range, according to officials.

Haledon police say that one of its firearms instructors was attending advanced firearms training when he was injured.

The officer, who was not identified, is in serious but stable condition at St. Joseph’s University Trauma Center.

“We wish our officer a speedy recovery and extend our unwavering support during this difficult time,” officials wrote in a statement.

The Passaic County Prosecutor’s Office Shooting Response Team is investigating the incident.