The Court Martial in Mogadishu sentenced two soldiers to death and three others to 39 years in prison for killing seven civilians in Goloweyn in August.
Hours after a roadside bomb blast injured three policemen in Mogadishu, a suicide bomber hit AMISOM peacekeepers near an army base.
The move comes after Kenya hosted the leadership of Somaliland, a breakaway state not recognised by Mogadishu, following months of tensions between the two neighbours.
As Trump considers withdrawing US troops from Somalia, Somali analysts believe this is dangerous rhetoric which has more to do with domestic politics than security in Somalia and the wider region.
Although Uganda is the largest troop-contributing country to the AMISOM peacekeeping force, experts say all foreign armies should withdraw from Somalia and allow local forces to take the charge of maintaining peace and security.
At least 30 people died in a span of 24 hours in shootings and blasts attributed to the militant group.
The summit marks the first of its kind since the country plunged into conflict with the toppling of the President Siad Barre in 1991.
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