A tourist believed to be from the US has been killed in a lion attack at a game park in South Africa, a park official has told the BBC.

Paramedics were called to the scene but she died from her injuries, while the man is still receiving treatment.

The popular Lion Park is 30km (19 miles) north of Johannesburg.

The park's rules forbid visitors from driving through the lion enclosure with their windows down, reports the BBC's Milton Nkosi from Johannesburg.