A huge portion of a flyover connecting the four-lane tunnel on Kalka-Shimla National Highway-5 collapsed on Thursday due to a landslide triggered by  heavy rain.

Videos show two vehicles were hit when the flyover suddenly caved in, but  no casualties have been reported so far.

Torrential rain and cloudbursts have caused damage in other parts of the state as well.

"There's been massive rain in Himachal since last night. All deputy commissioners have been put on alert to report about the damages. There have been infrastructure losses in Kullu and Mandi areas," said Chief Minister Jai Ram Thakur.

Two deaths were reported from Kullu district as a house was buried in a landslide.

In another village in the same area, several shops and three vehicles were washed away following a cloudburst and flash floods earlier this morning.

The national highway to Kullu from Mandi was blocked, too, following a landslide near Pandoh in the morning. Traffic has been diverted through Kataula.

At Bharmour in Chamba, the pilgrimage of Manimahesh was stopped due to the danger posed by flashfloods caused by a cloudburst for the second time this week.