Mangaluru quartet of Nithik Nathella, Danush Suresh, B Benedicton Rohit and Adhithya Dinesh created a new national record for Tamil Nadu, clocking 5.66 seconds during the men's 4x100m medley relay on the third day of the Senior National Aquatics Championships here on Thursday.

The quartet surpassed the previous record of 3:47.22 set by the Services Sports Control Board (SSCB) in 2022.

Also on Thursday, Akash Mani, Vidith S Shankar, Kartikeyan Nair and Srihari Nataraj of Karnataka broke the record with a time of 3:46.09, but finished second.

Thursday's event also saw Karnataka's Aneesh S Gowda pull away already in the second round of the men's 1500m freestyle to win gold.

Dharshan S from Karnataka followed him as the remaining participants gradually fell behind. With five laps to go, Aneesh had a good lead and easily finished first with a time of 16:06.11, while Dharshan S finished second in 16:16.83.

In the women's 800m freestyle event, Telangana's Vritti Agarwal dominated in the first lap and took first place in 9:16.14.

Bhavya Sachdeva, Shirin and Sri Charani Tumu fought closely behind Vritti until the last lap.

Delhi's Bhavya finally took second place in 9:19.74.

Railway Sports Promotion Board's Bikram Changmai and Dhanush S competed head-on in the 200m butterfly and exchanged edge leads in the first round.

But Harsh Saroha of Haryana peaked in the third lap and prevailed in the contest before Bikram pulled away in the last lap to win in 2:02.76s. Harsh finished second in 2:03.95s.

In the women's 200m butterfly, Astha Choudhury, Hashika Ramachandra and Vritti Agarwal competed in a three-way battle from the first round.

Karnataka's Hashika, with a burst of speed in the final moment, secured her third gold medal in the competition with a time of 2:21.16s.

Telangana's Vritti settled for second place with a time of 2:21.89s.