A bus carrying a wedding party plunged into a gorge in mountainous northern India, killing at least 18 people and injuring another 28, a news report said Tuesday.

The bus fell 600 feet after part of a highway where it was parked caved in, the Press Trust of India news agency quoted superintendent of police V.P. Singh as saying.

The accident occurred in Rudraprayag district, 155 miles northeast of New Delhi.