However, complete details of the causes will only be known after the investigation, officials said. ECR general manager Tarun Prakash, who was in Raghunathpur to supervise the restoration works, told PTI that the priority is to clear the tracks. "The cause of derailment will be known only after a proper investigation. At present our priority is to clear the tracks. Until normal traffic is restored, trains running on the route will be diverted," he said. Indian Railways cancelled ten trains and diverted 21 trains after the accident.