A bus has plunged off a cliff into a river southeast of the Peruvian capital of Lima, killing 50 people, including 13 children.

The accident occurred Friday night after the bus left the provincial capital of Santa Teresa. It fell about 650 feet (200 meters) into the chasm. Authorities said bodies were found as far as 330 feet (100 meters) away from the impact site.

Firefighter Capt. David Taboada said no survivors were found. He also said authorities had not determined the cause of the accident.

The high-altitude roads of the Peruvian Andes are notorious for such bus plunges, with poor farmers comprising many of the victims.