A remote-controlled bomb killed four Ugandan peacekeepers and a civilian in the Somali capital Mogadishu on Wednesday as Islamist militants followed through on a threat to wage an Iraq-style insurgency. Five peacekeepers and two children were also wounded in the attack on the African Union convoy, which an AU security source said was the first of its kind against the 1,600-strong Ugandan contingent -- who had previously only been shot at.