TEHRAN (AFP) - At least 28 Iranian pilgrims were killed when a bus heading to neighbouring Iraq crashed into a residential building in a town near the border on Monday, the state broadcaster said. Twenty-eight people were killed in this accident and nine were seriously injured, a hospital director in the western province of Ilam was quoted as saying after the crash in the town of Chavar. The investigation shows the accident was caused when the driver lost control of the vehicle due to high speed, Iran traffic police chief Mohammad Rooyanian told the ISNA news agency. He said the bus was speeding at 130 kilometres an hour at the time of the crash. Irans roads are among the most dangerous in the world. Over 23,000 people died in car accidents in the country of 70 million in the past year to March.