Ugandans on Saturday paid tributes to Olympian Rebecca Cheptegei, who died after her partner set her on fire in Kenya, ahead of her funeral in her family village.

The 33-year-old, who debuted this summer in the women's marathon at the Paris Olympics, succumbed to severe burns last week after being attacked by Kenyan Dickson Ndiema Marangach.

The brutal assault shocked the East African region and prompted a global outpouring of tributes, with activists condemning another act of gender-based violence in Kenya.

On Saturday morning, residents, officials and relatives waited in the cold morning light to pay their respects in the village of Bukwo, some 380 kilometres northeast of Uganda's capital Kampala.

"We are extremely saddened," said her estranged husband Simon Ayeko, with whom she had two daughters.

"As a father it has been very difficult," he told AFP, explaining he had not been able to break the news to their children.

"Slowly we will tell them the truth."

The service to honour Cheptegei, a sergeant in the Uganda Peoples' Defence Forces (UPDF), started around 10am, with officials and relatives gathering at the local council office.

The coffin, swathed in the Ugandan flag, was saluted by officers from the UPDF who carried her body into the room overlooking the remote rolling hills of her childhood.

The athlete was a "heroine", local presidential representative Bessie Modest Ajilong told AFP, describing her as "out of ordinary."

"As leaders, we saw Cheptegei as an inspiration."

Her body was moved from the local council headquarters to a nearby sports stadium where hundreds gathered to pay their respects.

Scores of athletes, among them Kenyan athletes Mary Keitany and Daniel Komen, travelled to the small village to attend the ceremonies.

"She greatly contributed to the promotion of athletics until her last days," coach Alex Malinga, who trained her as a teenager, told AFP.

"Cheptegei was one of those who inspired the talented young that one day they will be like her."

Police said Marangach sneaked into her home to hide while she was at church with her children.

The couple had argued over ownership of the property where she lived with her sister Dorcas Cherop and daughters, according to her family.

"I think at that time, their relationship had become sour," Cheptegei's brother-in-law, Moses Kipsiro, told AFP.

"I didn't know then something was wrong," said Kipsiro, who previously trained with Cheptegei and also hails from Bukwo.

Her attacker later died from injuries sustained in the assault.

The vicious assault has thrown yet another spotlight on what activists have called a femicide epidemic.

Kenya reported 725 femicide cases in 2022 alone, according to the latest UN figures.

A report the following year by Kenya's National Bureau of Statistics found 34 percent of women had experienced physical violence since the age of 15.

At least two other athletes, Agnes Tirop and Damaris Mutua, have lost their lives in domestic violence incidents since 2021.