A laptop computer may have hidden the explosives used to blow a hole in the side of a passenger jet flying over Somalia, investigators have said.
A source close to the investigation and a Western official based in Mogadishu told CNN that the bomb contained military grade explosives after receiving the initial analysis of residue from the jet.
However a US government source warned that such tests have a high false-positive rate and further tests are under way.
Analysts yesterday said that the bomber may have smuggled a bomb on board the plane in his wheelchair before moving to a different seat once on board, a Western diplomat briefed on the investigation told the Wall Street Journal.
The flight, which originated in Jeddah, Saudi Arabia but had stopped off at Mogadishu Airport, was thought to be flying at between 12,000 and 14,000 ft when the bomber blew a hole in the fuselage.
One man was killed when he was sucked out of the Daallo Airlines aircraft mid-flight on Tuesday, and his body was found 30km north of Somalian capital Mogadishu.
He has been named by local officials as Abdullahi Abdisalam Borleh, 55, from Somaliland, but they did not confirm if he was the suicide bomber.
The charred body of a man, who may have fallen from the plane, was found in Balad, 18 miles from Mogadishu.
While no claims of responsibility for the attack have been made, experts have named Islamic extremists Al-Shabab as the most likely culprits.
The militant group have been behind some of the worst violent attacks in Somalia in recent years.
Survivor Hassan Mohamed Nur said the cabin went black and filled with thick smoke as passengers screamed in terror.
Mr Nur said the passenger, an elderly man, caught fire before he was sucked from his seat and out of the Airbus A321.
‘I saw the passenger, a man in his early 60s, get sucked out of the plane,’ he told MailOnline. ‘There was a huge bang. A big hole appeared in the side of the jet and the man disappeared through it.
‘One minute he was sat in his seat, the next it he was gone. He’d been sucked out of the plane.
‘People were screaming. We all thought we were going to die.’
Two people were injured before the pilot was able to land safely back at Mogadishu Airport.