Nigeria's friendly with Burkina Faso on Monday in London has been called off after several Burkina Faso players failed to gain visas to enter the UK.
A siege is over at a Burkina Faso hotel seized by suspected Islamist gunmen, the government says, but reports say a nearby hotel is now under attack.
Final clinical trials of a malaria vaccine the first to reach this stage suggest it could help protect millions of children against malaria.
Congo reached the quarter-finals of the Africa Cup of Nations for the first time since 1992 by topping Group A.
Congo needed a draw to progress and went ahead when Thierry Bifouma swept home Ferebory Dore's cross.
Burkina Faso required a win and offered little until the last 10 minutes when Aristide Bance scored at the far post.
Congo won it in the 87th minute when goalkeeper Germain Sanou punched the ball on to the shoulder of Fabrice Ondama and it trickled into the net.
Congo's qualification added to the remarkable record of manager Claude LeRoy, who has now achieved seven quarter-finals in eight appearances at the tournament with five different countries.
Congo had the best chance of a very disappointing first half in the 21st minute when Delvin N'Dinga played in Bifouma on the left-hand side of the penalty area, but the striker dragged the ball wide of the far post.
Burkina Faso, who reached the final of the last tournament in 2013, finally woke up as the match approached half-time.
First Jonathan Pitroipa set up Prejuce Nakoulma, who could not control the ball and Congo goalkeeper Christoffer Mafoumbi rushed out to clear.
Then Pitroipa received a pass inside the area, chested it down but sent his shot high over the bar.
The second half started in a much more eventful way with Dore heading a good chance past the near post from a 47th-minute corner.
Burkina Faso almost took the lead in remarkable fashion three minutes later.
Goalkeeper Sanou cleared the ball downfield from well inside his own penalty area and it reached the opposite area where it bounced over his counterpart Mafoumbi and rolled just past the post.
Bifouma put Congo in front a minute later from close range from a right-wing cross by Dore, who seemed to be clearly offside when he received the ball.
Burkina Faso needed to score twice to have a hope of going into the last eight but rarely looked likely to do that.
Congo nearly added to their lead with a 72nd-minute free-kick, but N'Dinga's powerful shot was saved by Sanou.
Burkina Faso finally found the net in the 81st minute when Mafoumbi spilled an Alain Traore free-kick, but substitute Issiaka Ouedraogo's finish was ruled out for offside.
Bance gave Burkina Faso's fans fleeting hope when he scored from Ouedraogo's cross, but 90 seconds later it was all over when the ball went in off Ondama as Congo secured victory.