Police in Denver are searching for suspects after an officer was shot and critically injured during a traffic stop.

Chief Robert White said Tuesday that one suspect was arrested, and officers were searching for possibly two others. The injured officer, Antonio Lopez Jr., was shot several times and remained in critical condition after surgery.

The suspect was also shot in the leg.

Police spokesman Sonny Jackson said Tuesday night that after the shooting, the suspect fled on foot and carjacked a nearby vehicle. The suspect was arrested a short time later, and several schools were placed on lockdown while police investigated.

It was the second time in a week a Denver officer was shot. An officer was struck in the leg during a standoff on Wednesday.