Brandon Stone and Daniel Brooks share the lead at the European Tour's South African Open after the third round was suspended because of approaching thunderstorms and the threat of lightning on Saturday.

Englishman Brooks was already one of the players who had to get up early to complete their second rounds because of similar stormy weather and a suspension on the second day in Johannesburg. He was 1 under for the day through nine holes to be 10 under overall.

South Africa's Stone was also 10 under after 11 holes, picking up four birdies in his opening nine. They have a two-shot lead over Keith Horne, who completed only nine holes of his third round.

Five-time champion Ernie Els missed the cut by a shot after finishing his second round earlier Saturday.