Six explosions have hit the Somali capital,
Two children were among those injured in a market where some of the mortars exploded during Friday prayers.
Dozens have been killed by insurgents since the Ethiopian-backed government forces defeated Islamists last year.
The African Union is planning to send 8,000 peacekeepers to
But violence has escalated in the past two months.
Prison hit
The BBC's Mohammed Olad Hassan in
The government says some 3,500 remnants of the Islamists are responsible for the escalating violence in the capital.
More than 10,000 civilians have fled
An advance team of AU troops reportedly arrived in Baidoa in southern
The first batch of 1,700 Ugandan soldiers are expected in
When President Yoweri Museveni bade farewell to his soldiers on Thursday he said their mission was not to disarm militias, but support the government.
There have been several protests against the deployment of AU forces in
An insurgent group calling itself the Popular Resistance Movement in the Land of Two Migrations has threatened to wage war against the AU troops.
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