(Recasts with suicide blast) KANDAHAR, Afghanistan, Feb 4 (Reuters) - A suicide bomber blew himself up in an attack on a convoy of NATO troops in Afghanistan's southern city of Kandahar on Sunday, police said. No one else was hurt in the blast which occurred when the bomber rammed an explosives-packed car into the convoy on a main road in Kandahar, the bastion of the militants and nicknamed "bomb city" because of constant rebel attacks.
