Chinese runner He Jie’s victory at last week’s Beijing Half-Marathon has been overshadowed by a scandal involving three Kenyan runners who appear to let the Chinese competitor win the race.

Sunday’s Beijing Half-Marathon saw 25-year-old He Jie crossed the finish line first, in 1:03:44, under a second ahead of an African trio of runners who collectively claimed second place. It was an impressive achievement for the Chinese runner, especially since one of the runners-up was former 5km world record-holder Robert Keter of Kenya, but his win was quickly called into question on social media after suspicious videos recorded during the race made their way online. The fact that He seemed to be the only one sprinting as he approached the finish line was bizarre enough, but one clip shows Kenya’s Willy Mnangat signaling his countryman Keter and Ethiopian runner Dejene Hailu Bikila to hang back and waving He Jie to overtake them.