Three terror suspects arrested in Scotland have been transferred to the custody of the Metropolitan Police and taken to London.
Officials said the move would allow a single prosecution over the failed car bombs in London and Glasgow.
A fourth suspect, who is being treated in hospital, has been named as Kafeel Ahmed. He is believed to be a doctor.
Meanwhile, the police were examining a car removed from near a Glasgow mosque following three controlled explosions.
Eight people arrested in connection with the attempted attacks are believed to have links with the NHS.
One of the three suspects moved to London, Iraqi Bilal Abdullah, was arrested at the scene of the attack on Glasgow Airport.
It is understood he worked as a locum doctor at the Royal Alexandra Hospital in Paisley.
The other two men, aged 28 and 25, who are believed to be trainee doctors, were arrested on Sunday at the hospital's residences.
Mr Ahmed, who was detained at Glasgow Airport along with Dr Abdullah, suffered severe burns and remains in a critical condition under armed police guard at the same hospital.
Six of the eight people arrested are now being held at London's Paddington Green police station.
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The move to transfer the suspects to London was authorised by the Lord Advocate Elish Angiolini, Scotland's most senior law officer.
The statement from the Crown Office said: "This decision has been taken in the public interest, as part of a joint police investigation, to facilitate the wider investigation into the events in London and Glasgow and to allow, in due course, a single prosecution of these connected events."
The decision was taken in light of the fact that cases of this type could be tried anywhere in the UK, the statement said.
It said: "All police investigations of whatever kind in Scotland remain under the direction of the lord advocate."
First Minister Alex Salmond said the move was made in the "public interest" but added it did not rule out prosecuting those suspected of being involved in the incident at Glasgow Airport in Scotland if need be.
"There is a substantial body of evidence that connects the incident at Glasgow Airport with incidents that took place elsewhere," he said.
The handover came as the police intensified their investigations in Scotland.
The controlled explosions were carried out on a car outside the Forth Street Mosque in Glasgow.
It has also emerged that suspect Dr Abdullah called a Paisley cab firm to order a taxi to the airport from his address in the village of Houston, Renfrewshire, some days before the attack.
Staff at the Paisley Cab Company said they were visited at 1445 BST on Saturday by police - just 25 minutes before the attack at the airport.
Police carried out searches of premises and vehicles within the grounds of the Royal Alexandra Hospital and controlled explosions have taken place.
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Detectives are still trying to trace the movements of the green Jeep Cherokee - registration L808 RDT - loaded with gas cylinders, which crashed into the doors of Glasgow airport's main terminal and burst into flames on Saturday afternoon.
Other suspects held in London include Dr Mohammed Asha, 26, and his wife Dana Asha, 27, who were arrested on the M6 in Cheshire on Saturday night, and a 26-year-old man who was arrested in Liverpool on Sunday.
Australian media have identified a man held in Brisbane as Dr Mohammed Haneef, 27, who formerly worked in Cheshire.
He was detained while trying to board a plane to India. A second doctor is also being interviewed in Australia.
Police have urged anyone with information to phone the confidential Anti-Terrorism hotline number on 0800789321.
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