At least 15 people were killed after a passenger bus crashed on Indonesia’s main island of Java early Monday, officials said.The inter province bus, carrying 34 passengers, lost control on a toll road just after midnight, struck a concrete barrier and rolled onto its side, said Budiono, a search and rescue agency chief who goes by a single name.According to officials, the bus was travelling from the capital Jakarta to the ancient royal city of Yogyakarta when the accident occurred. Further details about the cause of the crash and the condition of the injured are awaited.