SYDNEY, Australia (AP) _ Inge de Bruijn of the Netherlands broke her own world record in the 100-meter freestyle Wednesday night, posting a time of 53.77 seconds in an Olympic semifinal heat.

It was the 12th world record set or tied in five days at the Sydney International Aquatic Center.

De Bruijn, 27, has set two world records at the Games, adding the 100 freestyle to her gold-medal swim in the 100 butterfly Sunday.

``It was great,'' De Bruijn said. ``The last seconds were very tough, but I think I can go faster'' in the final Thursday.

De Bruijn broke her own record of 53.80, set May 28 at a meet in Sheffield, England.

She held records in three Olympics events before the Sydney Games.