(CNN)Somali intelligence officials released a video showing two airport workers
handling a laptop believed to have contained a bomb that later exploded
in a passenger plane.
In the video released Sunday, one airport worker takes the laptop and hands it to another employee.
The
employees then hand it over to a man who was killed when the laptop
blast pierced a hole in the plane's fuselage, said Abdisalam Aato, a
spokesman for the Somali prime minister.
Both workers have been arrested.
Somali
officials identified the lone fatality as Abdullahi Abdisalam Borleh.
He was sucked out of the airliner Tuesday through the hole from the
blast.
Bomber knew where to sit
Investigators
suspect Borleh, a Somali national, carried a laptop computer with a
bomb concealed onto the plane, according to a source familiar with the
investigation.
He knew precisely where to sit and how to place the device to maximize damage, the source told CNN.
Given
the placement, the blast likely would have set off a catastrophic
secondary explosion in the fuel tank had the aircraft reached cruising
altitude, the source said.
This blast hit at between 12,000 feet to 14,000 feet above the ground, killing the lone Somali national and injuring two others.
Though
it contained a military grade of the explosive TNT, the source said, it
failed to bring down Daallo Airlines Flight 3159. The pilot turned
around and landed safely in Mogadishu.
Somalia
asked U.S. officials for help with investigations, and several FBI
agents are on the ground assisting in Mogadishu, the spokesman said.
"This was a sophisticated attack ... so we reached out to our international partners," Aato said.
Militants behind attack
Investigators
believe the attack was orchestrated by Al Shabaab, although they are
not certain Borleh was a direct member of the group, according to the
source. No group immediately claimed responsibility.
Al-Shabaab is an al Qaeda affiliate, though some of its it has factions have declared loyalty to ISIS. It has been responsible some of the deadliest violence in recent years in Somalia and surrounding nations, including Kenya and Uganda.