A landslide at the Samardung under-construction tunnel in Namchi district, Sikkim, has killed at least seven workers and traps others inside, according to multiple reports. Authorities say the landslide blocks the tunnel entrance and leaves workers inside as emergency teams continue search-and-rescue operations. Several outlets report that a suspected gas leak follows the incident, with some accounts specifically mentioning methane. Officials and police indicate the leak complicates access to the tunnel and that rescue personnel use gas masks to reach trapped workers. NDTV and other reports also cite that the number of trapped workers is higher than the confirmed deaths; estimates range from around 12 reported earlier to about 27 workers feared trapped, though the exact figure is not consistently confirmed across sources. One report notes that the workers heard a sound resembling an explosion after the incident. Agencies including local authorities, disaster management personnel, and the National Disaster Response Force are involved, and ambulances and other medical resources are on standby while efforts continue to evacuate those who remain inside.