MANCHESTER ARENA ATTACK: WHAT WE KNOW
- 22 people, including many children, have been killed and 59 injured in the blast.
- The attack was carried out by a lone male suicide bomber who detonated an improvised explosive device. He died at the arena.
- He has been identified as 22-year-old Salman Abedi.
- Security services are investigating whether he acted alone or was part of a network.
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- A 23-year-old has been arrested in South Manchester in connection with the incident.
- Islamic State has claimed responsibility for the attack.
- The first victim has been named as college student Georgina Callander. Eight-year-old schoolgirl Saffie Roussos was also killed.
- Speaking after chairing a security meeting on Tuesday morning, Prime Minister Theresa May said the "callous" attack was "among the worst terrorism we have experienced in the United Kingdom".
- A vigil was held on Tuesday in Albert Square, Manchester.
- The explosion took place at Manchester Arena as people began streaming from the doors after a show by US singer Ariana Grande.
- The injured - including 12 under the age of 16 - were being treated at eight hospitals across Greater Manchester, Chief Constable Ian Hopkins said.
- President Donald Trump expressed his "deepest condolences" to the victims and branded the attackers "evil losers".
- Extra police officers have been put on duty in London following the attack, Metropolitan Police Commissioner Cressida Dick said.
- Andy Burnham, the Greater Manchester metro mayor, called the atrocity "an evil act".
- All national election campaigning was suspended after the explosion.
- A controlled explosion was carried out on Tuesday afternoon, as part of the investigation, at an address in Fallowfield.
