NEW DELHI, Oct. 1 (Xinhua) -- At least two people were killed and six others injured after a bus veered off the road and plunged into a deep gorge in northern Indian state of Himachal Pradesh, police said Monday.

The accident occurred in Mancholi area in the state's Shimla district.

"The bus belonging to the state-run Himachal Road Transport Corporation and carrying some 10 people fell into the gorge after its driver lost control of the vehicle while negotiating a curve Sunday evening," a police official said.

While one person died on the spot, another one succumbed to his injuries in a government hospital this morning, where six others are undergoing treatment, he said. "The condition of all of them are said to be critical," the official added.

A probe has been ordered into the incident, he said.

India has the highest number of road fatalities in the world. Road accidents occur mostly due to poor driving or badly maintained roads and vehicles.