At least four people injured in an explosion on Monday at Beledweyne Airport in Somalia, a security source said.
The explosion occurred when a passenger bus was parking at the entrance of airport, the source said on condition of anonymity due to restrictions on speaking to the media.
Moreover, another source claimed that the bomb was hidden in a suitcase on board the bus.
No group claimed immediate responsibility for the blast but last month Al Shabaab said it was responsible for a bomb attack that blew a hole in the fuselage of a passenger plane shortly after takeoff in capital Mogadishu.
Djiboutian soldiers and local security forces already cordoned off the area where at the airfield 325 kilometers (200 miles) north of Mogadishu.