Police on the Mississippi Gulf Coast say they believe two people fired guns in a Sunday incident that wounded three people.

Moss Point Police Chief Brandon Ashley tells local news outlets that investigators believe one person fired an assault rifle and the second person fired a handgun.

Two people were released from a hospital, while a third was critically wounded and required surgery.

Ashley says no witnessed have identified the people responsible.

A video released by police shows a man walking around a nightclub parking lot firing a rifle multiple times as others ran.

Shell casings and other evidence from the scene are still being processed at the Mississippi Crime Lab.

The incident happened about 10:30 p.m. Sunday. Security guards say they saw as many as 100 people involved.