Thirteen passengers were killed and 10 others injured when a bus fell into a gorge in Nainbagh in the district amid dense fog on Wednesday morning.

The accident took place when the driver of the state roadways bus failed to see a curve due to the fog and the bus plunged into a 150-feet deep gorge, police sources said.

The bus carrying 23 passengers was going to Bad Kot from Dehradun when the mishap took place.

The injured have been admitted to a hospital in Tehri.