Jakarta: Vishvanath Suresh (50kg) and Ganga (55kg) clinched gold medals as India concluded its Asian U-19 and U-23 Boxing Championships with strong performances in the finals here on Thursday.In the U-23 men's finals, India delivered an impressive showing with two gold medal finishes.Vishvanath, the reigning senior Asian champion, eked out a closely fought 3-2 victory over Japan's Daichi Iwai in the men's 50kg event while Ganga edged past Kazakhstan's Bexulatn Boranbek by a similar margin.Vanshaj (65kg) fought valiantly in the final but settled for silver after a 4-1 loss to Uzbekistan's Ilkhomjon Ergashev.In the U-19 men's finals, Indian boxers put up spirited efforts but finished with silver medals.Aditya (55kg) went down to Uzbekistan's Elyor Rustamov by 5-0, while Shubham Rajput (90kg) lost to Uzbekistan's Asadbek Sultanboev by a similar margin.