Police officers in London
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MI5 chief's terror attack warning

The UK faces a continued serious risk of a lethal terrorist attack taking place, the head of MI5 has warned.

Jonathan Evans says a large number of soon-to-be-freed prison inmates are "committed extremists and likely to return to terrorist activities".

He also said there was a growing threat from Somalia and Yemen, and that the growth of dissident republicanism in Northern Ireland was also a concern.

Gordon Corera reports.

  • 17 Sep 2010