Ihar Boki broke two records yesterday and followed that with another dominant display in the S13 division today.

The Belarus star, an 11-time Paralympic champion, triumphed in the 200 metres butterfly final today.

It came in a format in which swimmers spanning different classifications were judged by points rather than times.

Boki's time 2min 04.06sec duly proved enough for overall victory with 917 points.

Michael Golus, an S8 swimmer, took silver with 2:27.19 for 729 points while there was bronze and an Asian record for another S13 swimmer in Muzaffar Tursukhujaev of Uzbekistan.

He clocked 2:17.11 for 679 points and bronze.

Carlotta Gilli of Italy also broke the world record in the S13 category with a time of 2:25.37 in the corresponding women's 200m butterfly.

She amassed 799 points to win gold ahead of Poland's S10 swimmer Oliwia Jablonska, who was second in 2:34.22 for 701 points, and Luz Kerena Lopez Valdes of Mexico, who was third in 2:52.29 for 650 points.

A third world record came for Chantalle Zijderveld of The Netherlands in the women's 50m breaststoke.

She beat fellow Dutch SB9 swimmer Lisa Kruger to gold in 33.58 for 1,080 points.

Kruger took silver in 34.80 for 970 points and bronze went to Cyprus' SB12 competitor Karolina Pelendritou in 35.91 for 914 points.

A final day of competition is scheduled for tomorrow.