London (CNN) — New information has emerged from an intelligence operation about the possibility of an attack being planned in or near London, with subway stations and airports of particular concern to officials, a British security source told CNN Thursday.
CNN understands that the intelligence operation concerns a possible Mumbai-style attack, the source said.
The action is not connected to terrorism arrests last month in Stoke, Cardiff and London, the source said.
Full Story: Sources: Security threat level for London raised to ‘severe’ – CNN.com