Jin Young Ko had a three-stroke lead with four holes left when second-round play in the LPGA Tour's Cognizant Founders Cup was suspended because of darkness.

Play was delayed for 2 1/2 hours at the start because of fog, the second straight day the weather has forced a late start at the Mountain Ridge course. Sixty-three players were unable to finish.

Australia's Minjee Lee was one of the players to complete their round.

The Evian championship winner shot a second-round 68 to go with her opening 69 to be in joint ninth position, five shots behind Ko at 10 under.

"In front nine, I had a lot of missed shots, but I made a lot of good saves, so it's fine," Ko said. "I had a lot of good opportunity for birdies and left four holes for tomorrow. I will just take a rest tonight and then I will get better for tomorrow."

The second-ranked Ko opened with an eight-under 63 on Thursday for a three-shot lead. She has 11 consecutive rounds in the 60s, three short of the record that Annika Sorenstam set in 2005.

In six starts since losing the top spot in the world to Nelly Korda at the KPMG Women's PGA, Ko has won twice, been runner-up and had two other finishes in the top 10.

The 26-year-old South Korean star had control of the ShopRite LPGA Classic last week in southern New Jersey until she missed a series of putts from the 10-foot range, including the last hole to finish one shot behind Celine Boutier.

Lindsey Weaver, So Yeon Ryu and Perrine Delacour were tied for second at seven under. Weaver shot a 67, while Ryu had four holes left, and Delacour seven to go.

Weaver was in the only afternoon group to finish the second round, a threesome playing in 4 hours, 19 minutes. After hurrying to the ninth tee to just beat the horn, she closed with a bogey.

"Literally, nothing is more important (than finishing). I was telling my caddie, 'I would hate to be playing No. 9 at 7 am tomorrow morning,"' Weaver said.

"I'm happy to be done, even though I made bogey on it. I'm just happy I don't have to wake up at 5 am tomorrow. I'm good. I'm happy with it."

In Gee Chun, Xiyu Lin, Chella Choi and Jenny Shin were at six under. Chun had six holes left. Lin, Choi and Shin each shot 68-68.

Korda was at five under with three holes left. She's making her first start since the Solheim Cup a month ago.

Australians Su Oh and Hannah Green are two under, after playing 11 and 12 holes respectively.

Ko is the defending champion in the event, having won in 2019 in Phoenix. The 2000 event was cancelled.