Here is what we know so far about the terrorist attack at Manchester Arena.

22 people have been killed and 59 have been injured in the blast.

There are many children and young people among the dead.

The attack was carried out by a lone male suicide bomber who detonated an improvised explosive device. He died at the arena;

Security services believe they know his identity and are investigating whether he acted alone or was part of a network.

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 Cobra meeting on Tuesday Morning Prime Minister Theresa May said the attack was “among the worst terrorism we have experienced in the United Kingdom”.

A vigil will be held at 6pm on Tuesday, in Albert Square, Manchester

It is the worst terrorist attack in the UK since 56 people were killed in the 7/7 London bombings in 2005.

The explosion took place at Manchester Arena as people began streaming from the doors after a show by American singer Ariana Grande.

Greater Manchester Police said they were called to the venue at around 10.33pm and approach roads were closed.

Manchester Victoria station was evacuated and trains cancelled until at least the end of Tuesday.

They said the blast was “being treated as a terrorist incident”.

More than 400 officers were deployed on the operation throughout Monday night.

Manchester Victoria station was evacuated and trains cancelled.

The injured – including 12 under the age of 16 – are 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 in the wake of the attack, Metropolitan Police Commissioner Cressida Dick announced.

Andy Burnham, the Greater Manchester metro mayor, called the atrocity “an evil act”.

The Prime Minister condemned what was being treated as an “appalling terrorist attack” and said she would chair a meeting of the Government’s emergency Cobra committee on Tuesday.

All national General Election campaigning was suspended after the explosion.

A controlled explosion was carried out by police at the Cathedral Gardens area near Manchester Arena shortly after 1.30am.

Police said the suspicious item at the centre of the controlled explosion was just abandoned clothing.