ROANOKE COUNTY, Va. (WFXR) — The Roanoke County Police Department is investigating a two-vehicle crash that blocked off traffic on Williamson Road on Monday.

Police say it happened at the 6700 block of Williamson Road on Monday, July 4 just after 1:30 p.m. When officers arrived, they found a motorcycle that was involved in the crash and they say one “party” is in critical condition.

Police tell WFXR News that it’s not clear if alcohol and/or drugs were a factor in the crash. However, drivers are asked to seek an alternative route while the investigation is underway.