Story highlights

NEW: Somali authorities identify the man suspected of carrying an explosive onto a Somali airliner

The explosion rocked Daallo Airlines Flight 3159 soon after it took off from Mogadishu

Sources say a laptop computer may have concealed a bomb that blew a hole in the side of the jet

Nairobi, Kenya CNN  — 

The man sucked out of a Somali airliner after an inflight explosion has been identified as Abdullahi Abdisalam Borleh, an elderly Somali national, Somalia officials said Friday.

Investigators suspect he carried a laptop computer with a bomb concealed onto the plane, according to a source familiar with the investigation.

The source said Borleh apparently knew precisely where to sit and how to place the device to maximize damage. The source said, given the placement, the blast likely would have set off a catastrophic secondary explosion in the fuel tank had the aircraft reached cruising altitude.

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.

A military grade of the explosive TNT caused this week’s explosion on a Somali airliner, a source familiar with the investigation told CNN, citing an initial analysis of residue recovered from the aircraft.

The blast took place Tuesday on board a commercial plane after it set off above East Africa.

Two people were injured before the pilot landed safely, a passenger said.

Pictures from the ground showed a hole in one side of the airliner, just above its wing and slightly smaller than one of its doors.

An airport official estimated the Daallo plane was between 12,000 and 14,000 feet high when the blast occurred not long after it took off from Mogadishu International Airport.

The pilot then flew the Airbus A321-111, which had originated in Jeddah on Saudi Arabia’s Red Sea coast, back to the Somali capital.

Somalia is the easternmost point in the Horn of Africa.

No group immediately took responsibility for the act.

However, the U.S. official told CNN that investigators believe extremist group Al-Shabaab is responsible for the explosion. Al-Shabaab has been behind some of the worst violence in recent years in and around Somalia.

Some of it targeted tourists, such as last month’s deadly attack on a beachside restaurant-hotel complex in Mogadishu. Young people also have been targets, as shown in the massacre at Kenya’s Garissa University College. The general public also hasn’t escaped the group’s violence, as evidenced in a 2013 assault on an upscale mall in Nairobi.

CNN’s Evan Perez and Greg Botelho contributed to this report.