People are fleeing areas in the Somalia capital, Mogadishu, that came under attack overnight fearing more violence.
A BBC correspondent says the port, presidential villa and a minister's house came under fire and two civilians were wounded in a gun battle.
The government says it suspects the attacks were carried out by remnants of the defeated Islamist militia.
In Uganda, MPs have approved sending 1,500 troops to Somalia as part of an African Union peacekeeping force.
A decision on when the AU force will start deploying is expected within 48 hours.
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