Burundi got their CECAFA Challenge Cup campaign off to a bright start when they crushed Somalia 2-0 in their opening at the Machakos county stadium.
Christopher Nduwagira and Abdul Razak Fiston scored in each half as the Swallows overcame a stubborn Somali side on a waterlogged pitch.
Burundi, who are using the competition to prepare for the upcoming CHAN finals in South Africa in January, extended their unbeaten record over Somalia, whom they defeated 5-1 in last year's tournament in Kampala.
The victory took the tiny Central African nation to the top of Group B after group rivals, Zambia and Tanzania battled to a 1-1 draw in the match played later in the afternoon.
The Cosafa cup holders, Zambia, who are taking part as guests, were the first to hit the target via their veteran striker Felix Katongo.
Tanzania levelled the score two minutes after resumption when veteran striker Mrisho Ngassa outpaced the Zambian defence to easily tap the ball into the far left corner of the net.
Defending champions Uganda enter the fray on Friday against neighbours Rwanda, while Eritrea will face Sudan.