At least 20 people were killed after a bus rolled down a gorge near Shimla's Rampur on Thursday. (Photo: ANI/Twitter)

Simla: More than 28 people were killed and nine were injured after a private bus enroute Solan rolled down a deep gorge near Rampur in Himachal Pradesh on Thursday.

The accident happened around 9.15 am when the bus, carrying around 40 passengers, rolled down from the National Highway 5 connecting Simla to Kinnaur.

The civil and police administration have started the rescue operations and around seven injured have been taken to the nearest hospital till now.

Further details are awaited.