WILLIAMSBURG, Iowa (AP) — Authorities say up to 30 people have been injured in multiple crashes along westbound Interstate 80 near Williamsburg that have caused a bus to explode and a semitruck to overturn and catch fire. Iowa State Patrol Sgt. Nate Ludwig says between 20 and 30 people have been injured in the wreck. He says a chain reaction of collisions triggered the bus explosion.

Ludwig says emergency crews have responded to the area. The Iowa Department of Transportation reports the road between exit 216 and exit 211 are blocked due to the crashes. A detour has been implemented. No further information has been released.