Olympic champion Liu breaks 50km world record - IAAF

Liu, who won the Olympic distance 20km gold in Rio, clocked three hours, 59 minutes and 15 seconds for the longer race, the IAAF said in a statement, clipping more than five minutes off the previous record (4:04:36) set by compatriot Liang Rui in Taicang last year.

The 31-year-old now holds the world record for both the 20km and 50km distances, having clocked 1:24:38 in La Coruna, Spain in 2015 for the shorter distance.

She also won the 20km gold at the 2011 and 2015 World Championships.

(The story corrects typo in place name in first paragraph)

(Reporting by Greg Stutchbury; Editing by Peter Rutherford)