Heavy rains had triggered a landslide near tunnel number 16 on the Jammu-Udhampur section and huge mudslide entered the tunnel, Senior Superintendent of Police, General Railway Police, A K Mahajan, said.
The engine of Malwa Express which was passing through the tunnel was caught in landslide as it slipped over the debris around 7 AM, he said, adding that no one was injured in the mishap.
Due to the landslide, rail traffic on the section was disrupted and efforts are on to clear the route, but it is likely to take nearly two days for resumption of services, the official said.