ST. LOUIS (AP) — Authorities say an off-duty police officer has been shot in the arm and a suspect in the ankle in an exchange of gunfire in St. Louis.

The St. Louis Post Dispatch reports that the shooting happened Wednesday night after officers started following a stolen car. Interim Police Chief Lawrence O’Toole says gunfire rang out after tire-flattening device was used on the suspect’s car and again when the vehicle stopped less than a mile later.

The off-duty officer was wounded when he came out of his house to help. He was in good condition at a hospital. It’s not clear if he was hit by the officers’ or the suspects’ gunfire.

Two suspects, including the wounded one, were taken into custody. Police say a third suspect remains on the loose.