Around 7:25 yesterday morning, a semi eastbound on Highway 92 struck the rear of a stopped school bus. The bus had it’s flasher’s on, but the truck driver from Tracy claims that his vision was obstructed by sunlight. Four minors from Leighton were in the bus and were checked out by the school nurse. The Iowa State Patrol and Mahaska County Sheriff’s Office responded and were also assisted by the Iowa Department of Transportation. The accident is currently under investigation.