At least 230 people are now known to have died in the attack, the deadliest since Al-shabaab militants began their insurgency a decade ago.
Hundreds were wounded.
Meanwhile, the South African government has strongly condemned the attacks.
President Jacob Zuma sent a message of condolences to the Somali government as well as the families of the deceased and wished all the injured speedy recoveries.
The message says the SA government stands with the people of Somalia during this difficult time and will continue to work with other member states of the African Union and the UN to explore long-term solutions to the scourge of terrorism and extremism.
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— Sam Shaib (@samshaib) October 16, 2017
Let's keep Somalia in our prayers this morning ð
— Muzi Khanyile (@Dowpey) October 16, 2017