Investigators believe a bomb most likely caused the explosion aboard a plane that was forced to return to the Somali capital of Mogadishu for an emergency landing on Tuesday, two US government sources said on Wednesday.
Investigators also suspect the Al Shabaab jihadist group was behind the attack, although no organization has taken credit for the apparent bombing.
There was no immediate comment from Al Shabaab, which has waged a gruesome insurgency against the Western-backed Somali government and a multinational African Union military force.
One person died Tuesday when the Daallo Airlines Airbus A321 carrying 74 passengers was forced to return after a blast tore a hole in the fuselage. Local authorities in the Balcad area, about 30 kilometers north of Mogadishu, said the body of a man, believed to have been sucked out of the plane, was found in the area.