This is for the first time a landslide has blocked flow of the river. As a precautionary measure, villages along the river are on alert and people have been evacuated from the low-lying areas.
Union Home Minister Amit Shah spoke to the Himachal Pradesh chief minister to enquire about the landslide in the state, an official from the ministry said.
Ten people were killed, 13 rescued and several others feared buried under debris after a landslide trapped a bus and other vehicles in Kinnaur.
Heavy boulders fell on a tempo traveller carrying 11 people, killing nine and injuring two, according to the police.
A police official said one body has been recovered. An accurate estimate of casualties can be made only after the rescue operation is over.