UPDATE 2-Golf-Casey storms three shots clear at PGA Championship

* Briton on target for Wentworth double

* Dane Kjeldsen in second place

* McIlroy shoots best-of-week 65

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By Tony Jimenez

VIRGINIA WATER, England, May 23 (Reuters) - World number seven Paul Casey was poised for his third victory of the year after cruising into a three-stroke lead in the PGA Championship third round on Saturday.

The 31-year-old Briton played flawlessly on a warm, still day as a five-birdie 67 earned him a 13-under-par total of 203 at the European Tour's flagship event.

That left Casey three ahead of Dane Soren Kjeldsen (68) and four in front of Northern Ireland's Rory McIlroy, who catapulted into contention with a best-of-the-week 65.

In joint fourth place on 208 were Britain's Ross Fisher (67) and Charl Schwartzel (68) of South Africa.