NEW DELHI (Reuters) – India began investigating yesterday a train crash in which at least 23 people were killed, the fourth major accident over the past year on the world’s fourth biggest rail network. The cause of the derailment about 130km north of the capital New Delhi, in the state of Uttar Pradesh, was not known, said Northern Railways spokesman Neeraj Sharma. Thirteen coaches of the train came off the tracks as it was heading to the Hindu holy city of Haridwar, police said. The toll rose to 23 dead with at least 123 people injured. Mr Sharma said rescue operations had ended and a safety commissioner would launch an investigation yesterday. The cause of the accident was not known and the driver of the train would be one of the first people to be questioned, Mr Sharma said. He said the death toll could rise. A member of the railway board told reporters there was information that suggested the derailment happened because of some repair work on the track.