Two men arrested in connection with the botched car bomb attacks in London and Glasgow were released on Sunday without charge, the police said.
The men, aged 28 and 25 and thought to be trainee doctors, were arrested by Strathclyde police at the residences of the Royal Alexandra Hospital in Paisley in the early hours of July 2.
The two men were being held at London's high-security Paddington Green police station.
However, 26-year-old Jordanian doctor Mohammed Asha, who was arrested in Cheshire by officers of Metropolitan Police Counter Terrorism Command on June 30, remains in custody.
Police were granted a further seven days to question Dr Asha of Newcastle-under-Lyme Staffordshire on Saturday.
Three persons, including two Indians Sabeel Ahmed in the UK and Mohammed Haneef in Australia, have so far been charged over the failed attacks.
An inquiry was launched after two cars with petrol, nails and gas cylinders were found in London on June 29.
A day later, a burning car loaded with gas cylinders was driven suspectedly by Sabeel's brother Kafeel Ahmed into the main terminal building at Glasgow's international airport.
On July 6, Iraqi doctor Bilal Talal Samad Abdullah was charged with conspiracy to cause explosions. He was arrested at Glasgow Airport following the failed car bombing there.
On Saturday, 27-year-old Indian doctor Mohammed Haneef, held in Brisbane on July 2, was charged by Australian police with providing "reckless support" to a terrorist act.
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