Grenade blast rocks Rwandan capital

At least 20 people have been injured in a grenade attack in the centre of the Rwandan capital, Kigali.<br /><br />The explosion came as the country's electoral commission announced the results of a presidential vote on Monday. <br /><br />It gave president Paul Kagame another seven year term in office.<br /><br />Al Jazeera's Andrew Simmons reports from the Rwandan capital.