Ghana lost its 100 percent record in African Nations Cup qualifying with a goalless draw in Mozambique Sunday while fans rioted in Kenya during a shock loss to lowly-ranked GuineaBissau. Ghana's match in Maputo at the start of the fourth round of preliminaries kept it on course for the 2017 Finals in Gabon but proved a tepid affair in comparison to other qualifiers. GuineaBissau, 147th in the world rankings, took a first competitive away international win as it stunned Kenya 1-0 in Nairobi to emerge surprise leader in Group E. Portuguese-born striker Cicero scored the winner nine minutes from time, prompting rioting from the home fans with the match stopped for more than 30 minutes. The assistant referee flagged for a goal, adjudging that Cicero's header from a corner had crossed the line despite Kenya goalkeeper Arnold Origi apparently saving the effort. The awarding of the goal prompted a furious reaction from the Kenyan players and the crowd who threw objects, forcing police to fire teargas to quell the rioting. GuineaBissau is now on seven points in its group, one ahead of Congo and 2012 champions Zambia in Group E. Congo and Zambia drew 1-1 in Brazzaville. Jordan Massengo, who plays in the lower leagues in France, opened the score after 48 minutes but Zambia's Winston Kalengo equalized 20 minutes before the end. Captain Stephane Sessegnon scored twice for Benin as it beat South Sudan 4-1 to keep up an unbeaten run and take top place in Group C. Joel Mogorosi scored the winner in Francistown as Botswana beat the Comoros Islands 2-1 to join the leader in Group D. Chad announced its withdrawal from the qualifiers, pulling out of a scheduled match in Tanzania Monday because of a cash shortage. It had lost all three of their qualifiers before Sunday's decision. Halfway through the final group stage, Morocco, Egypt, Ghana, African champion Ivory Coast, Algeria, Senegal and Cameroon are all in strong positions to qualify for the Finals. — Agencies