A grenade attack on a Nairobi bus station last night killed at least five people and wounded nearly 60 others, in an assault Kenyan police blamed on the Islamist Shebab militia. "This is a cowardly act by al-Shebab elements," police spokesman Charles Owino told reporters at the site of the attack, the busy Machakos country bus station near the city Centre. "But we will not relent in the war. We will get them and we will continue with the war." Kenyan troops are currently fighting the Shebab in neighbouring Somalia. Initial reports spoke of three people being killed and more than 20 injured, two people had died at the bus station and a third on the way to hospital. But later two others succumbed to their injuries in hospital and the number of injured was revised upwards to 59.