Irish Terror Attack A 'Strong Possibility'

Home Secretary Theresa May said it meant an attack was a "strong possibility". It was the first time this threat level had been published, the Home Office confirmed. The head of security service MI5 warned last week that dissident republicans opposed to British rule in Northern Ireland could strike mainland Britain. The threat from Irish-related terrorism to Britain is still lower than the overall threat from international terrorism, which remains unchanged at "severe".