On Saturday, the Saudi-led coalition mistakenly bombed allied Yemeni government troops, killing about 30 fighters.
Divorce Al-Qaeda and wed Islamic State? Weak but still deadly Somalia's Shabaab sweats over its future
"Muslims have to unite against their enemy....[Shabaab] more than happy to join forces to strike the enemy of Islam harder" - commander.
Somalia's northern regions are impoverished and suffered knock-on effects of years of outright civil war further south, but are largely peaceful.