The attacker had explosives strapped to his body and infiltrated the General Kahiye Police Training Academy during an early morning parade, police said.
Islamist militants al Shabaab claimed responsibility for this weekend’s attack.
A bomb attack in Mogadishu killed at least 358 people this month.
But in Mombasa, for example, respondents pointed to a link between radical Islam and independence movements such as the Mombasa
At least 15 people were killed in the attack.
Are we losing out to the Chinese? Gilbert M. Khadiagala, University of the Witwatersrand The Chibok girls may never be found
The group is launching more and more raids in the region.
Reports that Iraqi Baathists, Iranian elements, and others have played a role in the workings of ISIS do not appear to be in keeping with the principle of ideological purity on which the Islamic State says it is based.