He was allegedly armed with a can of petrol.
During the altercation, the boyfriend was seen pouring a liquid on the woman before burning her.
Rebecca competed in theParis Olympicsthis year and finished in 44th place in the marathon.
The Ugandan Athletics Federation acknowledged the gruesome attack on theOlympic participant.
This follows an incident involving her Kenyan boyfriend pouring petrol and setting fire on her.
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