By Jane Barrett

TURIN, Feb 18 (Reuters) - South Korea stamped its authority on short track skating at the Winter Olympics on Saturday as 17-year-old Jin Sun-yu swept past the pack to win the women's 1,500 metres and Ahn Hyun-soo won his second gold of the Games.

Ahn nicked past compatriot Lee Ho-suk by a whisker to add the men's 1,000 title to the 1,500 gold he won earlier in the week. He had also pipped Lee to silver in the longer race.

It was a different story in the women's event where Jin, who has dominated the strategic 1,500 this season, overtook the pack a few turns from the end and stretched out an easy lead to cross the line well in front.

Again, it was another South Korean, Choi Eun-kyung, who took the silver, much to the delight of the packs of Koreans in the crowd, waving flags and cheering madly.

Byun Chun-sa, who crossed the line third, was disqualified after the race, denying South Korea a clean sweep and handing the bronze to China's Wang Meng, who won the gold medal in the 500 metres on Wednesday.

On the podium, Jin looked as if winning an Olympic gold was the most normal thing in the world as she simply waved to the crowd and smiled shyly.

The men's 1,000 bronze went to American Apolo Anton Ohno, who won the silver in Salt Lake City in 2002.

That race went down as one of the most bizarre in Olympic history when the front pack crashed and collapsed into the side pads on the last curve, leaving Australian Steven Bradbury, who had been lagging badly, to step over them and win gold.

South Korea set up a bitter rivalry with Ohno at the last Games after one of their skaters was disqualified from the 1,500 final, handing the American gold.

On Saturday, all the bad blood seemed to be flowing away as Ohno, who was visibly disappointed when he crossed the line third, smiled and congratulated his rivals on the podium before waving to the crowd.