Britain was on its hightest security footing Sunday as authorities investigating the attempted car bomb attacks in Glasgow and London said they had arrested a total of five people, and a controlled explosion was carried out at a Scottish hospital, according to DPA. The explosion was carried out at the Royal Alexandria hospital in Paisley, close to Glasgow, where one of two men detained in connection with the previous day's bomb attempt on the city's airport remained in critical condition having sustained severe burns. Police described the explosion as a precautionary measure, confirming that the vehicle was connected to the previous attacks but insisting they did not believe it contained explosives. The 4x4 vehicle used in Saturday's failed attack had contained undetonated propane gas cylinders in an echo of Friday's twin car bomb attempts in London. Earlier police said a 26-year-old man was arrested in connection with a "suspicious vehicle" close to Liverpool, whose airport was briefly shut down on Saturday evening.
