A witness on the scene said the injured officer was Justin Wilkers, who was shot in the face while on duty in 2013.
The latest incident happened around 4 p.m. Tuesday as officers were responding to reports of a man with a gun in the 600 block of N. Jefferson St.
Officers saw a man matching the description and tried to arrest him. Police said an officer was injured during a short chase. A witness on the scene told WHYY that the suspect tried to toss a gun on a roof, but it came back down and struck the officer on the head. That witness said the injured officer was Wilkers.
The suspect is in custody. Police said more updates will be forthcoming.
In February 2013, Wilkers was shot in the face during a routine traffic stop in Wilmington. The three-year veteran of the police department spent several days in the hospital and had surgery to remove the bullet lodged in his jaw. Three suspects were arrested in connection with the shooting.