Attack ends on a government building in Somalia's capital Mogadishu, police say, adding those killed also include deputy labour minister Saqar Ibrahim Abdalla.
US airstrikes in Somalia have picked up dramatically since President Donald Trump took office and approved expanded military operations in the Horn of Africa nation.
Al Qaeda-linked group used guns and car bombs to take control of the base. The attack comes three weeks after an assault on the Kismayu army base near the border with Kenya.
This latest smash-and-grab style attack is only the latest to take place in the conflict-ridden East African nation.
Attack at the gates of African Union's main peacekeeping base in Mogadishu claimed by al Shabab militant group.
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