Christopher Furlong/Getty Images
Police officers search cars in Liverpool, England, on July 1, 2007.
Police officers search cars in Liverpool, England, on July 1, 2007. Christopher Furlong/Getty Images
Four men are in custody in Britain, and a fifth is in critical condition in the hospital after driving a flaming jeep into the entrance of Glasgow International Airport in Scotland.
Police arrested three of the men in northwestern England in connection with the incident, and are searching houses just outside Glasgow.
The new British Prime Minister Gordon Brown has raised the terror alert to "critical" — the highest possible level — and Britain is bracing itself for the possibility of more attacks.
Officials say the attack is linked to two car bombs that were defused by police in London on Friday.