PITTSBURGH — Police say a man arrested after putting his SUV in reverse and pinning an officer was attempting to use heroin and had refused to drop a pocketknife when the officer confronted him at a Pittsburgh park and ride.

Joseph Dwinga was charged Monday with assaulting an officer, carrying a firearm without a license, reckless endangerment and other offenses. The 21-year-old has five active criminal cases since Feb. 5. Those charges include theft.

Information on his bail status and a lawyer to comment on the charges in Monday’s incident wasn’t immediately available. A preliminary hearing is scheduled for March 31.

Officials say the Port Authority of Allegheny County officer fired twice after he was struck by the SUV. They hit the vehicle but not the driver. The officer wasn’t seriously injured.