Four labourers died and one was injured after an explosion trapped them deep inside a suspected illegal coal mine at a village in Meghalaya's East Jaintia Hills district on Thursday, police said. The incident was reported from the Thangsku area, Superintendent of Police Vikash Kumar said. The police have sought assistance from the State Disaster Response Force (SDRF) to carry out rescue operations at the site. "The SDRF team are yet to come," Kumar said. The explosion is suspected to have occurred during coal mining activities at the site, which are believed to be illegal.