Four passengers were critically hurt and 10 received minor injuries as the bus they were travelling in rolled down about 25-ft off the road, after a portion of the Mandi-Shimla highway caved in at Kangu in Sundernagar subdivision of Mandi district. The bus was on its way from Sundernagar to Shimla, said Mandi superintendent of police Soumya Sambasivan.
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She said emergency teams took the injured to the Sundernagar Hospital.
A total of 252 people have died in the state since the onset of monsoon this season, of which 107 have died in road accidents.