Nazarov's 2016 gold is Tajikistan's only Olympic victory as an independent nation. He was a world championship silver medalist the year before. The AIU also says it has suspended Albert Rop, a Kenyan-born runner who competes for Bahrain and holds the Asian record in the 5,000 meters. He's accused of breaking so-called whereabouts rules requiring athletes to make themselves available for drug testing.
The world championships start Friday in Qatar.
More AP sports: https://apnews.com/apf-sports and https://twitter.com/AP_Sports