Threat level to the UK from international terrorism raised to CRITICAL.
The Joint Terrorism Analysis Centre (JTAC) has changed the UK threat level from international terrorism from SEVERE to CRITICAL.
The current threat level means an attack is expected imminently.
The Prime Minister Theresa May said in a statement this evening:
"... The work undertaken throughout the day has revealed that it is a possibility we cannot ignore that there is a wider group of individuals linked to this attack. This morning, I said that the Joint Terrorism Analysis Centre - the independent organisation responsible for setting the threat level on the basis of the intelligence available - was keeping the threat level under constant review. It has now concluded, on the basis of today's investigations, that the threat level should be increased, for the time being, from SEVERE to CRITICAL. This means that their assessment is not only that an attack remains highly likely, but that a further attack may be imminent."
Read more about threat levels.