World-record holder Usain Bolt withdrew from Jamaica's Olympic trials only minutes before the men's 100 metres final on Friday. Unlike the United States, where the first three finishers in the trials win Olympic berths, Jamaica's selection policy allows medical exemptions. The 29-year-old won Olympic gold in the 100 during the Beijing Games in 2008 and in the 2012 London Olympics. Bolt took to Twitter to shed light on his injury, which he described as a Grade 1 hamstring tear. "He, Bolt, is out of the remainder of the championship on medical exemption," Walker said.

Source: CBC News July 02, 2016 02:36 UTC