The former boyfriend of Ugandan Olympic athlete Rebecca Cheptegei, who killed her by setting her on fire, has himself died from burns sustained in the attack, a Kenyan hospital official has said.

Dickson Ndiema ambushed the marathon runner as she returned home from church more than a week ago, before dousing her with petrol and setting her ablaze.

Local administrators said the two had been in conflict over a small piece of land in north-west Kenya, where Cheptegei lived and trained.

Ndiema died on Monday night at the intensive care unit where he had been admitted with more than 30% burns on his body.