The European Union has military vessels in the region to protect key shipping lanes from Somali pirates. The U.S. State Department, meanwhile, has put a bounty on leaders of al-Shabaab, an al-Qaida affiliate seeking to establish an Islamic state in Somalia.
The formal interim period for the Somali governments ends in August as slow gains are made against al-Shabaab in an effort supported by forces from the African Union.
Kenyan Prime Minister Raila Odinga said more U.S. and European support was needed to help with a "final onslaught" against al-Shabaab, the BBC reports.
Kenyan military forces have fought in support of the interim government in war-torn neighboring Somalia.
The European Union's mandate doesn't extend to ground operations to address al-Shabaab threats in Somalia.
"If they (the United States) can also bring military assistance so much the better but for now we are talking about financial assistance," Odinga added.