Oli Scarff, AFP | Britain's Prime Minister Theresa May and Chief Constable of Greater Manchester Police, Ian Hopkins, at the force's headquarters in Manchester, northwest England on May 23, 2017

Police say at least 22 people have been killed -- many of them children -- in a suicide attack at a concert venue in the northern UK city of Manchester. The Islamic State group has claimed the attack.

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Here's what we know so far:

Salman Abedi, 22, has been named by the police as the suspected suicide bomber.

Police say at least 22 people have died and 59 injured after the explosion at an Ariana Grande concert in Manchester Arena at around 10.25pm on Monday night.

US pop star Ariana Grande has a young fan base, and the venue was packed with children.

The youngest known victim has been identified as an eight-year-old girl.

Concert-goers described hearing a massive explosion followed by panic as young people tried to flee the venue.

The Islamic State group has claimed responsibility for the attack.

British police held a series of raids across the city and arrested a 23-year-old man. Security services are still examining whether the bomber had accomplices.

Thousands of people gathered for a vigil by City Hall in the heart of Manchester on Tuesday evening, in a mark of respect to the victims and in solidarity.

For all the developments from today as they happened, follow our blog below.

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