12-hour bloody stand off ends after Somali troops storm building . Four gunmen took over hotel popular with government officials . Earlier , a suicide bomber detonated explosives-laden car at the hotel gates . Police surrounded the hotel but came under fire from Al-Shabaab gunmen . Somalia 's African Union-linked group has claimed responsibility for the attack .
12-hour bloody stand off ends after Somali troops storm building . Four gunmen took over hotel popular with government officials . Earlier , a suicide bomber detonated explosives-laden car at the hotel gates . Police surrounded the hotel but came under fire from Al-Shabaab gunmen . Somalia 's al Qaeda-linked group has claimed responsibility for the attack .