Elephants trampled to death a Spanish tourist at a South African wildlife reserve after he left his vehicle and approached a herd to take photographs, according to police and local government authorities. The 43-year-old man was killed on Sunday at Pilanesberg National Park in North West province, about 180 km. from Johannesburg.

The elephant herd included young calves. Wildlife experts often warn that elephants are especially protective of their young and can react aggressively to a perceived threat.

Police said the man’s fiancée and two other women, all from Johannesburg, were also in the vehicle and unharmed.

Piet Nel, acting chief conservation officer for the North West Parks and Tourism Board, said guests at Pilanesberg are told they are not allowed to leave their vehicles while driving through the park and must sign forms showing they understand the rules.

“In some cases, people are oblivious to the dangers in the parks,” Nel said. “We must remember that you are entering a wild area.”

Elephants killed two American tourists this year in separate attacks in the southern African nation of Zambia.