A sinkhole more than three feet in diameter has indefinitely closed a roughly mile-long eastbound stretch of U.S. 50.

The hole opened up in the roadway shortly before 5 p.m. Wednesday. Maryland State Police Corporal David Johnson said that the road would remain closed tonight and would probably not open tomorrow either.

The sinkhole, Johnson explained, looks like a three- to four-foot-wide hole from the surface, but in fact tunnels under all lanes of the road. Engineers will need to examine and stabilize it before cars can cross again.

Rush-hour traffic has been diverted off of U.S. 50 and onto Route 665. After about a mile, cars can enter U.S. 50 again, Johnson said.

Johnson said that the opening of the hole caused no damage to cars or injuries to travelers. He said the cause of the sinkhole was unknown.