Ugandan warns S. Sudan rebels after Museveni-Kiir meeting Ugandan President Yoweri Museveni warned South Sudan's rebel chief Monday to comply with a ceasefire deal ending Tuesday or face action by regional nations. "We gave Riek Machar some four days to respond, and if he doesn't we shall have to go for him, all of us, that is what we agreed in Nairobi," Museveni told reporters after meeting South Sudan's President Salva Kiir in Juba. Images and soundbites.