ARUSHA, Tanzania - At least 31 people, including pupils and three teachers, were killed after a school bus plunged into a gorge in Tanzania on Saturday morning, authorities said.

The accident involved pupils and three teachers of the Lucky Vincent English Medium Primary School located on the outskirts of northern Tanzania's safari capital of Arusha.

Theresia Mahongo, Karatu District Commissioner, said that the mishap occurred after their school bus plunged into the Marera gorge located more than 150 kilometers from Arusha city, the main gateway to Tanzania's northern tourist destinations of Ngorongoro crater and Serengeti National Park.