Mumbai (Web Desk): At least 44 killed in bus crash in northern India while a bus swerved off a mountain road and plunged into a deep ravine today (Wednesday).

According to an official, the bus with 56 passengers on board plunged into a river in northern Himachal Pradesh state around 115 kilometres from the capital Shimla.

District commissioner of Shimla Rohan Chand Thakur told Indian media, “A preliminary report shows that a private bus fell into a gorge and has killed more than 40 people. The latest report shows 44 people have been killed and no survivors were wounded.”

He told, police rushed to the scene where rescue efforts were underway. It was not immediately clear what caused the accident. However, India has some of the world's deadliest roads with more than 150,000 fatalities annually due to poor roads, badly maintained vehicles and reckless driving.

In February, 16 people were killed and more than 50 injured when a truck carrying churchgoers overturned in a hilly region of northeast India .

According to the survivors, the driver was manoeuvring recklessly and lost control of the vehicle in the rugged terrain. A month earlier 13 people, mostly children aged between seven and 14, were killed when a school bus collided with a truck in northern India .