Here are the main developments following the bombing at the end of a pop concert at Manchester Arena:
:: Twenty-two people have been killed and 59 people injured. Children were among the dead.
:: Police say a lone male suicide bomber detonated an improvised explosive device.
:: It is being treated as a terrorist incident.
: Police say they are trying to establish whether the dead attacker was working alone or as part of a network.
The bomber was carrying a rucksack, according to Sky sources.
:: Police are working with counterterrorism officers and intelligence services to find out more about the attacker.
:: Police were called at 10.33pm to reports of an explosion at the end of an Ariana Grande concert.
:: Victims described being thrown by the blast that scattered nuts and bolts across the floor.
:: The gig was sold out, and thousands of children and teenagers were in attendance.
:: Sixty ambulances attended the incident, and the wounded were taken to eight hospitals around Greater Manchester.
:: Ariana Grande has tweeted: “broken. from the bottom of my heart, i am so so sorry. i don’t have words.”
:: The singer’s management team, Scooter Braun Projects, said: “Words cannot express our sorrow for the victims and families harmed in this senseless attack. We mourn the lives of children and loved ones taken by this cowardly act.”
:: Home Secretary Amber Rudd has said the explosion was a “barbaric attack deliberately targeting some of the most vulnerable in our society”.
:: Theresa May has condemned the “appalling incident”. The Prime Minister was due to chair a meeting of the Government’s emergency COBRA committee on Tuesday morning.
:: General Election campaigning has been suspended.