50-metres freestyle preliminariesHeat two resultsYesterday1. O. Abdourahman 27.252. E. Mohamed 27.263. W. Ching 27.304. J. Niyomugabo 27.385. M. Ganzi 27.58SWIMMER Jackson Niyomugabo became the latest Rwandan athlete to exit the London Games after failing to reach the semi finals of the 50-metres freestyle competition yesterday at Aquactics centre.The two-time Olympian set a personal best of 27:38 to finish fourth in the heat stage. He came behind Djibouti’s Osman Abdourahman, who clocked 27:25. Egypt’s Elkheder Mohammed finished second in a time of 27:26 and Wei Ching of American Samoe, who clocked 27:30.Niyomugabo improved his previous best by 36 seconds he clocked fours ago in Beijing. He came ahead of Uganda’s Mugula Ganzi, who finished in fifth position with 27:58 and Cameroon’s Paul Ekane who came sixth in 27:87 and Ethiopia’s Teshale Girma who finished last in 28: 99.In the overall rankings, Niyomugabo finished 51 places behind Bovell George of Trinidad and Tobago who went through as the best qualifier for the semifinals after clocking 21:77 seconds.The top 16 swimmers from the heats progressed to the semi-finals while the top eight will advance to the final.Niyomugabo follows compatriot Fred Yannick Sekamana (Judo) in the exit chamber after the French-based athlete was beaten on Monday by Brazil’s Bruno Mendoca in the preliminary round. Action continues today with swimmer Alphonsine Agahozo competing in the 50-metree freestyle. The 18-yeer old will compete in heat three; line up in lane four alongside Ethiopia’s Gebremedhin Yanet, Araakji Mohammed of Qatar, O’Reilly Clashing of Antigua and Barbuda, Izmaylova Katerina of Tajikistan. Others include; Hemthon Vitiny of Cambodia, Samassekpu Fatoumata of Mali and Shajan Aminath of Maldives.