South African officials say an elephant has overturned a vehicle carrying two tourists, injuring one of them.

A statement from Kruger National Park says the tourists are of "Chinese origin."

The statement says an elephant in the park attacked the vehicle on a road at 6:30 a.m. Monday, and a medical team in a helicopter rushed to help the injured male driver. He was taken to a hospital for further treatment.

Park spokesman William Mabasa says it is unclear why the elephant became aggressive. But he is appealing to the public to be alert in the park and try not to get too close if they see an elephant approaching on the road.

The vast Kruger park lies in South Africa's northeast, next to Zimbabwe and Mozambique.