LONDON, Ont. - So Yeon Ryu continued to pull away from the pack at the Canadian Pacific Women's Open by completing another bogey-free round to move to 15-under par going into the weekend.

Ryu, a 24-year-old from South Korea, shot a 6-under 66 in her morning round Friday to take a five-stroke lead over playing partner Anna Nordqvist of Sweden.

Nordqvist is in the clubhouse at 10-under after a 3-under.69.

American Christie Kerr, who won this tournament the last time it was at London Hunt and Country Club in 2006, shot a 68 Friday to move into third place at 9 under.

Brittany Lincicome, who was a runner-up to Inbee Park at last week's LPGA Championship, had the best morning round at 7 under to move to 8 under for the tournament.

Na Yeon Choi was also at 8 under with her afternoon round underway.

Jennifer Kirby of Paris, Ont., remained the low Canadian after an even-par round to remain at 5 under, while amateur Brooke Henderson of Smiths Falls, Ont., shot 71 to move to 3 under, almost certainly enough to make the cut.