Around 50 people are feared dead after two HRTC buses were washed away after a massive landslide in Kotroopi area of Mandi district early on Sunday. He added that rain was hampering the rescue efforts.
Six bodies were recovered from the site of the landslide.
Following the incident, Prime Minister Narendra Modi stated: "Pained by the loss of lives due to landslide related accidents in HP's Mandi district".
Initial reports claimed several vehicles, including a bus is feared trapped in the debris on NH 154 at Kotrupi village of Padhar in the district.
One of the state roadways bus was hit by the landslide debris and skidded off the road, falling down by nearly a kilometre.More news: U.S. stocks snap 3-day losing streak in roller coaster week
More news: Federer punches ticket to Montreal semis
More news: Redskins put LB Murphy on IR
The bus from Chamba to Manali was carrying the maximum number of passengers.
Hundreds have died across India in torrential rain, floods and landslides since the onset of the wet season in April. Some families said they lost their cattle in the landslide.
Meanwhile, National Highway 21 from Mandi to Aut was closed for travelling passengers due to the threat of landslides.
Rescue teams reached the scene but struggled in the dark and steep terrain, with the army later joining the search. Over 40 passengers were on board the bus headed to Manali from Chamba at the time of the disaster. "We are not sure how many people were in this bus", he told AFP.
In another landslide reported on Saturday at Dwara on Chandigarh-Manali highway, two people were injured when the debris fell on a moving auto.