Washington County 911 reports that the North Junction of Interstate 79 to Interstate 70 East was shutdown Thursday afternoon following an accident on Interstate 70 East between the junction and the Murtland Avenue Exit. Dispatchers tell us that accident involved a tractor-trailer and a motorcycle. The accident caused major traffic back-ups on the interstates and in and around the city of Washington as traffic was detoured off the highway. At least one person was seriously injured and taken to a Pittsburgh hospital. This is a developing story. Check back for details.