COLUMBUS, Ohio -- Police in Ohio’s capital city are interviewing people wounded in an early morning club shooting in an attempt to identify suspects.

Columbus police say an argument erupted into gunfire around 3:30 a.m. Sunday inside J&R Party Hall. They say five females and four males were shot, with wounds ranging from minor to life-threatening. Two people were still in critical condition hours later.

Seven people were taken to Grant Medical Center, and two people were at OSU Medical Center, CBS affiliate WBNS reports.

Columbus police say an argument erupted into gunfire around 3:30 a.m. Sunday inside J&R Party Hall. CBSN

Police have interviewed victims, who either reported they didn’t see anything or refused to cooperate. Officials found multiple caliber shell casings inside the party hall and are following up with persons of interest.

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In another early Sunday morning shooting three weeks ago, Cincinnati police responded to a dispute that escalated into a gun battle inside the Cameo nightclub. Two people died, and 15 others were injured. A man has pleaded not guilty to charges including murder.