At least 11 people have been killed in a bus crash in Indonesia's West Java Province. Police said on Thursday that eight people were also seriously injured after a bus crashed into a truck. All of the injured passengers were transported to hospital. Local media reported that the bus was traveling at high speed when it hit the back of the truck on a highway in the western district of Subang. Initial reports said the driver of the bus might have been drowsy. Police are still investigating the case. Earlier this year, a road accident in Indonesia's Sumatra Island left almost two dozen people dead. Road accidents in Indonesia are frequent and usually spike up during holidays.