SINGAPORE — Joseph Schooling, showing no signs of weariness despite his grueling schedule, collected another two gold medals at the 28th Southeast Asian Games Tuesday, taking his golden stockpile to six and with the possibility of three more to come. The 19-year-old easily won the 100 meters butterfly, his favorite event, then led off the Singaporean 4x100m freestyle relay to an easy win. The Texas-based Schooling has won gold in each of the six events he has contested at Singapore's new Aquatic Centre over the last three days, and is an overwhelming favorite to win his three remaining races. He has broken the SEA Games record in all of the races he has contested so far, as well as getting under the 'A' qualifying time for next year's Rio Olympics in four different event. Schooling's 18-year-old teammate Quah Zheng Wen has already won eight medals in the pool, including five gold, and has the chance to bag another four. Quah swam the anchor leg in Tuesday's relay after he had earlier stormed to victory in the 400m individual medley. Vietnam's Nguyen Thi Anh Vien, the outstanding female swimmer at the Games, won another two golds, in the 200m freestyle and 200m butterfly. The 17-year-old, based in Florida, also has a silver and a bronze and two more races left. — Reuters