Australian Titmus breaks 400m freestyle world record

CANBERRA, May 23 (Xinhua) -- Australian swimming superstar Ariarne Titmus has broken the women's 400-meter freestyle world record at the national championships, according to Swimming Australia.

Titmus, the reigning Olympic champion over 200 and 400m, on Sunday night finished the 400-meter freestyle in 3:56.40, breaking the previous world record set by American Katie Ledecky in 2016 by 0.06 seconds.

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