"We don't know how many people are still trapped there in the rubble but efforts to reach them are ongoing," a police officer was quoted by Kenya’s Standard newspaper as saying.
Several gunmen reportedly used explosives to attack the Bisharo Guest House in the Mandera region on the border with Somalia. Ten guests and a caretaker were among those killed.
The outlet quoted Mandera County commander Job Boronjo who said at least four people were wounded and fears were that more could be trapped under the debris.
Al-Shabaab, an al-Qaeda affiliate based in Somalia, has been staging attacks in neighboring Kenya for sending troops to help the weak Somalian government in its struggle for the control of the country’s territory with Islamists, warlords, and pirates.