Elephants trampled to death a Spanish tourist at a wildlife reserve in South Africa after he left his vehicle and approached a herd to take photographs, police and local government authorities said Tuesday.

The 43-year-old man was killed on Sunday at Pilanesberg National Park in North West province, about 111 miles from Johannesburg, police said.

The elephant herd included young calves. Wildlife experts often warn that elephants are especially protective of their young and can react…