Usain Bolt has won the men's 200 metres final at the Rio Olympics, winning a second gold medal of the games after also taking out the 100 metres.

The Jamaican sprinter won in a time of 19.78 seconds in wet conditions and has the 4x100m relay to come, where he will attempt to complete the triple triple.

Canada's Andrew De Grasse claimed silver with Frenchman Christophe Lemaitre collecting bronze.