Ten people were killed and 19 others hurt Wednesday when a bus carrying preschoolers flipped over in the western Mexican state of Michoacan, authorities said.

The accident occurred at 11:00 a.m. on the Uruapan-Taretan highway, state officials said.

Aboard the bus were children and instructors from the Juan Escutia preschool in Uruapan, traveling to a crocodile farm in El Sabino.

Several parents accompanied the youngsters on the outing.

The state government dispatched a helicopter to the accident scene to transport the injured to hospitals in Uruapan and Morelia, Michoacan’s capital.