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.
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