Nine labourers were trapped inside a coal mine in Assam's Dima Hasao district on Monday after a sudden gush of water flooded the site, Chief Minister Himanta Biswa Sarma said. The incident took place at the Assam Coal Quarry, situated in the 3 Kilo area of Umrangso in the district. Rescue operations were launched immediately with teams consisting of local authorities, emergency responders and mining experts working to locate and free the trapped workers.