A sewer line repair has forced Lancaster police to close the 300 block of E. Walnut Street.
Lt. Todd Umstead said the block west of Plum Street is closed to vehicle traffic until further notice.
Westbound traffic is being diverted at Plum Street. Commercial vehicles must turn south on Plum.
The block will likely remain closed for several hours, police said.
Umstead said he was initially given incorrect information that the roadway had partially collapsed and a city truck was stuck.
He said there is no sinkhole, and there is no stuck truck.