KANSAS CITY, Mo. -- Police are investigating what prompted a shootout that injured two men early Wednesday morning.

Investigators told KMBC that a man used a gun to smash the window of a car at 54th Street and Lydia Avenue and began firing at a couple inside.

Police said the man in the car pulled out a gun of his own and fired back. The woman passenger got out of the car and kept low to the ground. She was not hurt.

The man in the car was wounded in the arm. The attacker was hit in the chest and is in critical condition, KMBC reported.