BEIJING (AP) — The Latest from the IAAF world championships (all times local):

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8:45 a.m.

Matej Toth was leading the 50-kilometer walk after 15K in the world championships.

Toth, who has the third-fastest time in history, passed the mark in 1 hour, 7 minutes, 28 seconds and was 39 seconds clear of Jared Tallent of Australia, a two-time Olympic silver medalist.

Defending champion Robert Heffernan of Ireland, Mario Jose Dos Santos of Brazil and Lukasz Nowak of Poland were part of a group a further 10 seconds off the pace.

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7:40 a.m.

The 50-kilometer walk got under way Saturday morning, minus the only Russian entered in the competition.

Alexander Yargunkin was entered in the race but did not start amid reports that he did not travel to China because of the recent doping scandal engulfing race walking in Russia.

Jared Tallent, the two-time Olympic and two-time world championship silver medalist from Australia, was among the early leaders.