India won four gold medals and a bronze on the second day of the Asian Junior Athletics Championships at Ho Chi Minh City, Vietnam, today.Ashish Jakhar struck the first gold for India in the men's hammer throw event with a personal best of 69 metres. Jisna Mathew brought home the second gold medal, in the women's 400 metre event.In the women's 1500 metres, India took centre stage, winning both the gold and bronze. Lily Das bagged the gold medal, while compatriot Hamilan Kaur Bains took the bronze. Ajay Saroj made it a double for India in the 1500 metre men's event, clinching the top spot.Earlier, on the first day, India's Murali Kumar Gavit bagged the bronze medal in the men's 5000 metre, while Ravina took the bronze in the women's 10,000 metre walk.