Sprinting star Usain Bolt is in danger of missing the 2016 Rio Olympics after pulling out of the Jamaican Olympic Track and Field Trials with a hamstring injury.

The six-time Olympic gold medalist was complaining of a hamstring injury after winning his heat, and was later diagnosed with a grade one tear.

Fortunately for Bolt, the Jamaican Athletics Association allows medical exemptions to injured athletes, meaning he can still make the team for Rio if the injury isn't serious.

Bolt has said he is aiming to prove his fitness at the London Anniversary Games later this month to qualify for the Olympics.