A grenade attack wounded 20 people near an open-air fruit and vegetable market in Rwanda's capital Kigali, Reuters cited police as saying on Tuesday. A Reuters witness said some of the victims lost their legs and arms when the grenade exploded as night fell in the Gasabo district of the capital. "A grenade blast injured around 20 people. We think there was only one grenade," Police Spokesman Theos Badege told Reuters at the scene of the blast. -- SPA