A Minnesota man was arrested Wednesday for assault after he allegedly drove away while a police officer’s arm was trapped in his truck window, CNN reports.

Luke Alvin Oeltjenbruns was stopped by law enforcement in Hutchinson, Minn., after they received reports that he had been involved in an altercation over a mask. During the incident, Oeltjenbruns allegedly hit a hardware store employee with lumber.

During the police encounter, an officer was standing on the truck’s running board when Oeltjenbruns is accused of rolling up the window on his arm. The suspect then allegedly drove away at speeds of up to 40 miles per hour, leaving the officer hanging off the vehicle, Hutchinson Police Chief Tom Gifferson told CNN.

The police officer used a rescue hammer to shatter the truck window in order to free himself. Oeltjenbruns then gained possession of the hammer and allegedly proceeded to hit the officer on the head with it, CNN reports.

The officer injured during the incident was hospitalized and has since been released.

According to booking information shared by the McLeod County Sheriff’s Office, Oeltjenbruns was charged with first-degree assault for causing “great bodily harm.” 

The county sheriff’s office did not immediately respond to The Hill’s request for comment.

The news of the incident comes days after former Minnesota law enforcement officer Kim Potter was charged with second-degree manslaughter in the shooting of Daunte Wright.