A law enforcement officer who was responding to reports of destruction of property was suddenly attacked and stabbed by an assailant on Monday morning.

According to the Baltimore Sun, the Maryland State Police Trooper fired on the knife-wielding man, fatally striking him.

The trooper—who has not been identified—was airlifted to a trauma center where he was treated and released.

Police identified the assailant as 34-year-old Michael D'Angelo.