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Northern Ireland terror threat level raised in Great Britain Northern Ireland terror threat level raised in Great Britain
(35 minutes later)
The threat level from Northern Ireland-related terrorism in Great Britain has gone up from moderate to substantial.The threat level from Northern Ireland-related terrorism in Great Britain has gone up from moderate to substantial.
It means an attack in England, Scotland or Wales is "a strong possibility".It means an attack in England, Scotland or Wales is "a strong possibility".
Home Secretary Theresa May said the level, set by security service MI5, "reflects the continuing threat from dissident republican activity".Home Secretary Theresa May said the level, set by security service MI5, "reflects the continuing threat from dissident republican activity".
The level for Northern Ireland-related terrorism in Northern Ireland remains "severe", meaning an attack is "highly likely". The level for Northern Ireland-related terrorism in Northern Ireland remains severe, meaning an attack is "highly likely".
Despite the increase in the threat level from Northern Ireland-related terrorism in Great Britain, it remains lower than the threat to the entire UK from international terrorism
This is set at severe - the second-highest of the five ratings used.
BBC security correspondent Frank Gardner said it had been 15 years since the last Northern Ireland-related attack in Great Britain, but there was now a "real fear" in the security services that deadly tactics of the past would be used again.
But he said the "far bigger" threat to mainland Britain came from the Islamic State group and its supporters.
'Little support'
Mrs May confirmed the change of threat level relating to Great Britain - meaning three of the four countries of the UK - in a written statement to Parliament.Mrs May confirmed the change of threat level relating to Great Britain - meaning three of the four countries of the UK - in a written statement to Parliament.
She gave no further details of any intelligence had led to the level being changed.She gave no further details of any intelligence had led to the level being changed.
"As a result of this change, we are working closely with the police and other relevant authorities to ensure appropriate security measures are in place," she wrote."As a result of this change, we are working closely with the police and other relevant authorities to ensure appropriate security measures are in place," she wrote.
The public should "remain vigilant and report any suspicious activity to the police", she added. In a separate statement, Mrs May said dissident republicans "command little support", and the "vast majority" of people wanted peace.
She said it was "sensible" for the public in Great Britain to be vigilant, but said the threat level should "not affect how we go about our daily lives".
At Easter the New IRA, the group responsible for the murder of prison officer Adrian Ismay in March, warned that its members were "determined to take the war to the age-old enemy of our nation".At Easter the New IRA, the group responsible for the murder of prison officer Adrian Ismay in March, warned that its members were "determined to take the war to the age-old enemy of our nation".
The threat level for Northern Ireland-related terrorism in Great Britain was raised from moderate to substantial in 2010, then reduced back to moderate in 2012.The threat level for Northern Ireland-related terrorism in Great Britain was raised from moderate to substantial in 2010, then reduced back to moderate in 2012.
The threat level to the UK from international terrorism is currently set at severe. For this measure, Northern Ireland is not rated separately.
The top threat level is critical, which means an attack is "expected imminently".The top threat level is critical, which means an attack is "expected imminently".