At least eight people were killed and 12 others were injured when a Uttarakhand bus rolled down a cliff at Gaighat, about 15 kms from Nerwa in Chopal tehsil of Shimla district on Thursday. The ill fated bus was going to Tunni in Uattrakhand from Vikas Nagar, said the police. There were more than 20 people in the bus and the injured were rushed to Nerwa hospital. Seven people had died on the spot and one scummbed to his injuries in Nerwa Hospital. Seven other seriously injured patients were referred to Indira Gandhi Medical College Hospital in Shimla.