Thirteen-time Paralympic gold medallist Jessica Long, who competes in the S8 and SB7 category events, secured two podium finishes at the Indiana University Natatorium.

This included gold in the 400 metres freestyle and silver in the 100m breaststroke.

Paralympic bronze medallist Colleen Young and Paralympic silver medallist Tharon Drake won the respective SB13 and SB11 100m breaststroke events, while five-time Paralympian Curtis Lovejoy and Alyssa Gialamas won the respective SB1 and SB4 50m breaststroke competitions.

"This is my first start in the World Series circuit," Drake said.

"It was an awesome opportunity for a gold.

"Team USA is doing well, and it’s been an amazing meet so far."

Paralympic bronze medallist Robert Griswold additionally claimed gold in the S8 400m freestyle.

Leanne Smith secured silver in the S3 200m freestyle, while six-time Paralympic medallist Becca Meyers swam to second place in the S13 400m freestyle.

Lawrence Sapp captured the bronze medal in the S14 200m freestyle.

There was also an impressive performance from McKenzie Coan, who set an American record in the S7 400m freestyle.

He swam to fourth place in a time of 5 min 9.49sec.

"It felt amazing," Coan said.

"It feels so good to be back out there.

"My first big Para-meet of the season, and I couldn’t have asked for a better final swim.

"It was so much fun being out there with all of them and I’m really happy with that race.

"I have so much pride swimming for the United States, and to be able to come here to Indy and have an amazing meet so far.

"To be able to do that in my favourite event is so much fun, and I feel so lucky to be able to be here and do this."

Athletes from across the world are competing on US soil for the second stop of the World Series circuit.

The event, which is being held in Indianapolis for the second year in a row, features 198 swimmers from 17 countries.

The World Para Swimming points system is being used at World Series competitions.

All athletes’ results at each event are calculated using a standardised points system.

This will ensure that the overall winner will be the best performing athlete over the duration of the World Series, meaning that every performance counts.

Competition is due to continue tomorrow with the 50m backstroke, 100m backstroke, 50m freestyle, 150m individual medley and 200m individual medley events.