Distance runner Rebecca Cheptegei -- who just competed in the 2024 Olympics in Paris -- was set on fire by her boyfriend in a brutal attack in Kenya over the weekend, cops say.
Trans Nzoia County Police Commander Jeremiah ole Kosiom told reporters the incident happened on Sunday ... after the athlete and her partner, Dickson Ndiema, had gotten into an argument over property.
"During the altercation," Kosiom said, "the boyfriend was seen pouring a liquid on the woman before burning her.