Officials said Sunday that a manhunt was underway after a Memphis police officer was shot and killed on Saturday night during a traffic stop, the Associated Press reports.

In a statement, Memphis police identified the officer as 33-year-old Sean Bolton.

According to the AP, Memphis Police Director Toney Armstrong said during a news conference that police had been alerted around 9:18 p.m. on Saturday night that an officer had been shot. Police said that a civilian had used Bolton’s radio to notify police.

The suspect is on the run, the AP reports. Police have not yet made an arrest.

Update 3:45 p.m. – The AP reports that police are looking for a potential witness to the shooting and that a “person of interest” has been taken into custody. No charges have been filed.

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