Two of the terror suspects arrested as police investigate attacks on London and Glasgow are foreign doctors who were working in British hospitals.

Bilal Abdulla, an Iraqi doctor, was arrested at the scene of the attempted car bombing at Glasgow airport.

The other medic is a Jordanian, who has been working in Britain for around two years.

Dr Mohammad Asha, 26, was arrested by anti-terror police with a 27-year-old woman believed to be his wife, Dana, on the M6 motorway.

Jamil Abdel Kader Asha, Dr Asha’s father said that he learnt about his son’s arrest through the media and claimed his “son is incapable of such acts”.

The couple's car was boxed in by a number of unmarked police cars which shepherded them onto the hard shoulder as they drove north near Sandbach service area in Cheshire, 12 miles from their three-bedroom home in Newcastle-Under-Lyme, Staffordshire.

Police in London have secured warrants to continue holding the pair in custody until Saturday, along with a 26-year-old man arrested in Liverpool. All three are being questioned at Paddington Green police station in west London.

The driver of the Jeep that crashed into Glasgow airport was taken to the Royal Alexandra Hospital in a critical condition, but he was not formally arrested as he is too badly injured to be questioned.

Tonight Scotland Yard announced another person had been arrested in connection with the terrorist attacks bringing the total now in custody to seven. At present, anti-terrorism police can hold the suspects for a maximum of 28 days without charge, although Gordon Brown has signalled that he wants to increase this to 90 days.

Dr Asha is reported to work in the neurology department at the North Staffordshire hospital, in Hartshill, Stoke-on-Trent. He qualified in Jordan in 2004 and is registered to work in this country until 2008, it is thought he holds a Jordainian passport and is of Palestinian origin.

His father called on the Government in Jordan to intervene and secure his son’s release. “Not all Arabs are terrorists," he said.

Jamil Asha confirmed that his son had obtained his medical degree in Jordan before moving to the UK. “I cannot imagine he had any other goal than to realise his ambition by studying in Britain,” he said, describing his son as pious but not extremist.

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