LINCOLN, Neb. (AP) — Police say a taxi driver was assaulted by a passenger in Lincoln.

Lincoln police Officer Katie Flood says that the 27-year-old driver was trying to drop off a passenger early Monday when the passenger began to argue over the $15 fare. According to Flood, the driver told police that the passenger punched him in the back of the head and the two struggled outside of the car.

Witnesses called police. Flood says the driver was taken to a hospital with injuries, including a gash to the head.

Police say the passenger has not been cited.