Twenty eight non-Muslims were ordered out of the bus, told to lie face down on the ground before they were shot in the heads.
READ: Gunmen execute 28 on Kenya bus near Somalia border
Somalia’s Shabaab militants claimed responsibility for the attacks.
Other major attacks by the militia group include the Westgate shopping mall attack that claimed 67 lives as well as Mpeketoni attacks where heavily-armed gunmen drove into the town of Mpeketoni and opened fire indiscriminately at anyone they came across.