OSAGE COUNTY – Authorities say three people have died in an accident along I-35 south of Williamsburg this morning. A large vehicle pulling a trailer left the roadway at the 167 mile marker in Osage County just before 9am. Troopers say 18 people were on board. Several serious injuries are also reported. Those injured have been taken to Stormont Vail Hospital in Topkeka, Ransom Memorial Hospital in Ottawa and the Olathe Medical Center.