Disputes between the two over border demarcations have been ongoing but heavy, armed fighting has been rare until now.
More than 50 soldiers were killed in the attack by al-Shabab fighters in May.
Announcement comes a week after al-Shabab fighters stormed a base housing African Union peacekeepers in Somalia.
Five soldiers serving with the African Union are found guilty of killing seven civilians in Golweyn.
Nel parco Virunga, sospetti sui trafficanti di animali selvatici
The Cranes will need to see off the reigning champions if they are to progress to the quarter-finals ......
Defending champions Morocco lead the group with three points after 1-0 over Togo ......
The Cranes had registered a win against Zambia after they had opened with a 1-1 draw against the Indomitable Lions ......
The veteran midfielder has failed to make it to the final squad which will take on South Sudan in a double-header ......
The Nigerian star has completed her transfer to the Swedish side after passing her medical and agreeing on terms ......