Ruth Chepngetich, the world record holder in the women's marathon, was provisionally suspended after a positive doping test.

Women’s marathon world record-holder Ruth Chepngetich was provisionally suspended for a positive doping test on Thursday.

Brett Clothier, who heads up the Athletics Integrity Unit, said: “In the intervening months, the AIU continued its investigation and today issued a notice of charge and imposed its own provisional su...