The Culture Select Committee will hold an inquiry today into the future of Manchester's Museum of Science and industry.
The group which owns MOSI said it may have to close one of it's three museums in the north in light of government spending cuts.
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The threat level has been raised to critical by MI5's Counter-Terrorism Analysis Centre.
Prime Minister Theresa May announced the decision from Downing Street.
In her message Theresa May praised the "inspirational bravery" and "unbreakable spirit" of Mancunians in the wake of the blast.