A five-car accident backed up traffic in Watertown this afternoon.
It happened in front of the State Office Building, closing part of Washington Street for half an hour.
No one was seriously injured and officials are trying to figure out what happened.
Usually, when there's only a couple vehicles, you can kind of tell, but with that many it's hard to tell," said Harold Robl of the Watertown Fire Department.
One parked car was hit.
