LEBANON, Ind. (AP) - Toby Keith's tour bus caught fire on a highway near Indianapolis. Keith was not on board at the time, and no one was hurt. Boone County sheriff's deputies say the fire started early yesterday morning on Interstate 65. Police closed the southbound lanes of the highway for a couple of hours. The back of the bus was charred. The cause is not known. Keith's next performance is the Oklahoma Twister Relief Concert in Norman, Oklahoma on Saturday.