KAMPALA, Uganda—Ugandan police are investigating an explosion on a long-distance bus that killed one person Monday, the second fatal blast in less than 48 hours in the East African country. The bus was traveling from the capital, Kampala, to the western part of Uganda. The cause of the blast was not immediately known. Police said in a statement they dispatched bomb experts to the scene in central Uganda. Initially, police had said two people on the bus were killed but later said there had been one death, without explaining the revision. They made no mention of injuries, but the Red Cross, which sent ambulances, said at least one person was injured in the leg. On Saturday, a bomb explosion at an eatery in a busy Kampala suburb killed one person. The ISIS group claimed responsibility for that attack. The terrorist extremist group said in a statement late Sunday that it …