Kathmandu, Sept 29: Nepali swimmer Atharva Singh set two new national records today at the 11th Asian Aquatics Championship. In the championship held in Ahmedabad, India, Atharva completed the men's 1500-meter freestyle in 17 minutes 43.57 seconds, breaking the 10-year-old record of 18 minutes 45.62 seconds set by Shirish Gurung.