Ugandan Olympic marathon runner Rebecca Cheptegei has died of injuries sustained after being set on fire by her boyfriend in Kenya, the Ugandan athletics federation said on Thursday. “We are deeply saddened to announce the passing of our athlete, Rebecca Cheptegei early this morning who tragically fell victim to domestic violence,” a statement on X said. “As a federation, we condemn such acts and call for justice. May her soul rest In Peace.” Kenyan police said that her Kenyan partner doused her with petrol and then set her on fire on Sunday, allegedly after a dispute. He is being investigated…