Digging through landslide debris,troops and relief teams are scrambling to rescue victims of the earthquake in remote mountainous areas of Sikkim in India after they reached an area here today closest to its epicentre. The death toll in Sikkim rose to 50 after the 6.8 magnitude quake struck this Himalayan state and neighbouring areas on Sunday,officials said,adding the overall death toll in the region had risen to over 80. In a silver lining for thousands of rescue personnel,the road connecting worst affected Mangan with the state capital Gangtok,65 kilometres from here,was reopened to help them make make a quicker push towards isolated areas in what is likely to be a herculean effort. Fears of fresh landslides,however,pose a threat to the reopened road. A small group of rescue personnel was brought in by Army helicopters here today following a slight improvement in the weather. Officials here said it could take three to four days to reach northern villages like Chungthang,about 55 kilometres from here,where people are feared trapped in debris. The road from Gangtok to Mangan is open. The number of deaths as reported by the Sikkim government is 50. This may increase further as rescue and relief teams reach into the interiors, Union Home Secreetary R K Singh told reporters in New Delhi. A PTI correspondent visiting some of the quake-hit areas of Sikkim found the people still in a state of panic. They refuse still to enter their houses which have developed cracks or tilted after the calamity. Many people were found sitting on roadsides,public places and near temples. Hundreds of people spent a second night in the open as aftershocks continued. Rescue teams were also using explosives to try to force their way through blocked roads. Stranded tourists have not yet been able to leave Gangtok and other places of the state as roads are either damaged or blocked by landslides. We can return only after the roads open. We are still in shock and cannot forget the trauma of the quake. We are staying out in the open, said Joy Basu,a resident of Sodepur near Kolkata visiting the mountain state with his family. A bus carrying 22 people which went missing in north Sikkim since the temblor struck was yet to be traced. A spokesman of the 17 Mountain Division said the bus could be anywhere in a radius of 10 to 15 km along the quake epicentre Mangan and Chungthang. Official sources said efforts are on to clear the roads in the north district from Mangan,a small town ringed by snow capped mountains. It is hoped that roads upto Chungthang and Lachung would be opened by tomorrow. The sources said relief and rescue operations have been stepped up by Army and National Disaster Response Force (NDRF) personnel with the improvement in weather. The biggest challenge now is to get rescue teams to the affected areas, said Sikkim Information Minister C B Karki. Food packets have been airdropped in inaccessible areas of the mountain state and round-the-clock work is on to clear debris and open roads still blocked due to quake-triggered landslides. District collectors are overseeing the work. The earthquake has left a trail of devastation damaging roads,houses and other structures,uprooting mobile phone towers and snapping communication and power lines. Power and telephone lines have been restored in Gangtok. But the fringe areas of the town are still without power. Communication links for areas outside Gangtok remain disrupted.