"We have sent (sprint coach) Anzrah back home. He presented himself as an athlete, gave the urine sample and even signed the documents. We cannot tolerate such behaviour," Kip Keino, chairman of the National Olympic Committee of Kenya (NOCK), said in a telephone interview from Rio.

Last week, Kenya sent their track and field managerMichael Rotich home from the Games following allegations that he requested money to let undercover journalists, posing as athlete representatives, know when drugs testers would come calling.

Rotich has denied the accusations.