A suspected suicide bomber who blew a hole in the fuselage of a Daallo Airlines plane last week and forced it to make an emergency landing in the Somalian capital, Mogadishu, was meant to be on a Turkish Airlines flight, Daallo's chief executive has said.

The bomber was sucked out of the plane through the one-metre-wide hole when the blast ripped open the pressurised cabin in flight, officials said.

The pilot landed the plane in the Somali capital, from where it had taken off.

No group has so far taken responsibility for the attack but US officials said they suspects Islamist militant group al-Shabaab, which has links to al-Qaeda, was responsible for the blast.

Daallo Airlines chief executive, Mohamed Yassin, said most of the passengers who were on the bombed flight were scheduled to fly with Turkish Airlines, but were flown to Djibouti by one of his planes after the Turkish carrier cancelled its flight, citing bad weather.

"That particular passenger (who was behind the blast )boarded the aircraft on a Turkish Airlines boarding pass and was on the list for the Turkish Airlines manifest," Mr Yassin told Reuters by telephone from Dubai.

Mr Yassin said Daallo picked up the 70 stranded Turkish Airlines passengers to fly them to Djibouti, including the suicide bomber.

In total, the flight had 74 passengers.

Turkish Airlines spokesman Yahya Ustun confirmed the carrier had cancelled a flight to Mogadishu last week due to bad weather and said the company will not make any further comment.

Somalia, mired in conflict since civil war broke out in1991, has few air links outside east Africa. In 2012, Turkish Airlines became the first major international commercial airline to fly out of Somalia in more than two decades.

Mogadishu's heavily guarded airport, which is often compared to the Green Zone in Baghdad, has several safety perimeter fences and checkpoints.

It houses a large UN compound along with several other Western embassies.

Somali officials said an investigation had been launched and arrests made, including airport workers.

US officials said investigators believe the bomb was hidden in a laptop computer, and the bomber had some type of connection to airline or airport personnel.

CCTV footage released by the Somali National Intelligence Agency appears to show two airport workers inside the terminal handing the suicide bomber a laptop, according to a government spokesman.

"Some of the people that we have arrested are cooperating," the spokesman told Reuters.

He said security at the airport has been stepped up and the government was seeking new technologies to improve screenings.

Al-Shabaab, which wants to topple the government and impose a harsh version of Islamic law, has targeted the airport in the past.

It has also attacked the Turkish embassy in Mogadishu.