A Somali police officer says a suspected suicide car bomb has detonated near the gate of a hotel close to the presidential palace in Mogadishu. A second blast was heard minutes later in the same area.
Captain Mohamed Hussein says gunfire could be heard inside the Nasa-Hablod hotel.
Today's blast in Somalia's capital comes two weeks after more than 350 people were killed in a massive truck bombing on a busy Mogadishu street in the country's worst-ever attack.
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Since the blast two weeks ago, President Mohamed Abdullahi Mohamed has been visiting regional countries to seek more support for the fight against the extremist group.
A 22,000-strong multinational African Union force in Somalia is expected to withdraw its forces and hand over the country's security to the Somali military by the end of 2020.
The US military also has stepped up military efforts against al-Shabab this year in Somalia, carrying out nearly 20 drone strikes.
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