At least 19 people have died and dozens injured after “an appalling terrorist attack” at Manchester Arena.
Downing Street have said an emergency Cobra meeting will take place at 9am on Tuesday.
Both the Conservatives and the Liberal Democrats have suspended election campaigning in respect of the victims.
Here’s everything we know so far:
An emergency hotline has been set up by Greater Manchester Police for concerned friends and relatives: 0161 856 9400.