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Second test confirms doping violation by marathon runner Rita Jeptoo

Kenyan marathon runner Rita Jeptoo attended a meeting at the Athletics Kenya offices in November.REUTERS

NAIROBI, Kenya — Kenya’s athletics federation says marathon runner Rita Jeptoo’s ‘‘B’’ sample has tested positive, confirming an earlier test that found traces of a banned performance enhancer.

Athletics Kenya said Friday that tests of the ‘‘B’’ sample were conducted between Wednesday and Friday at the World Anti-Doping Agency lab in Lausanne. The federation said in a statement that it will hold a hearing of Jeptoo’s case early January.

Jeptoo is a three-time winner of the Boston Marathon and two-time winner in Chicago. She is one of the highest profile Kenyan athletes to fail a doping test.

David Okeyo and Jackson Tuwei, who are vice presidents of Athletics Kenya, had said in November that Jeptoo’s ‘‘A’’ sample taken in an out-of-competition test in Kenya on Sept. 25 showed traces of the blood-booster EPO.