"My concern is whether we have cut and past a framework that doesn't work for Africa," says Amina Mohammed.
Somalia's president said that the country is in a "state of war" against the Al-Qaeda affiliate, which carried out deadly attacks on Sunday and Monday.
6.2 million Somalis are in need, many of whom live under al-Shabab's rule.
Hassan Ali Khaire is also a dual Norwegian-Somali citizen.
Somalia is at risk of another deadly famine, six years after the last killed 250,000 people.
The troubled country is holding crucial parliamentary and presidential elections.
The current Somali prime minister is running for the presidency in October's election.
Mohamud is running for re-election this fall.
The Somali Youth League hotel was also attacked in February, when nine people were killed.
The country's president will be elected by MPs, not by a popular vote.
The Al-Qaeda aligned group is expected to increase attacks ahead Somali elections in 2016