US Secretary of State John Kerry vowed support to Kenya on Monday in the battle against Somalia’s Al-Qaeda-affiliated Shebab, after calling for unity in the face of terror attacks.

US Secretary of State John Kerry vowed support to Kenya on Monday in the battle against Somalia's Al-Qaeda-affiliated Shebab, after calling for unity in the face of terror attacks.

"The US continues to stand resolutely with the government and people of Kenya in the effort to end scourge of violent extremism," Kerry said.

Kenya is struggling to stop increased cross-border attacks by the militants even though it has thousands of troops in neighboring southern Somalia as part of an African Union force, which Washington has funded by over half a billion dollars since 2007.

Last month Shebab gunmen massacred close to 150 people, mostly students, in a raid on a university in the northeastern Kenyan town of Garissa, the worst ever attack by the insurgents.

"I'm confident Dadaab will remain open while we work through how they will be able to go home, by doing a better job of finishing our task in Somalia," Kerry said.