"Heartbreaking" - Stars pay tribute to victims of terror attack at Ariana Grande concert

Following the explosion that occurred outside Manchester Arena last night, celebrities around the world have been tweeting their sadness and support about what has happened.

Ariana Grande had just finished performing at the arena on Monday night when an explosion was heard at 22:33 BST. We now know that heartbreakingly 22 people have died and 59 are injured.

Many of the celebrities who have tweeted have performed at the arena, including Harry Styles, Taylor Swift and Olly Murs. Popstars, actors and TV presenters have all come together online, here are a selection of their tweets.

Ariana Grande, whose concert it was, tweeted that she was 'broken'.

An emergency number is available for those who are concerned about loved ones or anyone who might have been in the area - 0161 856 9400.

On Tuesday morning a freephone emergency number was also released for those concerned about friends and family: 0800 096 0095

A full statement has been released from Chief Constable Ian Hopkins of Greater Manchester Police who this has been 'the most horrific incident' they as as force have had to deal with.

The full statement read:

'This has been the most horrific incident we have had to face in Greater Manchester and one that we all hoped we would never see.

Families and many young people were out to enjoy a concert at the Manchester Arena and have lost their lives. Our thoughts are with those 22 victims that we now know have died, the 59 people who have been injured and their loved ones. We continue to do all we can to support them. They are being treated at eight hospitals across Greater Manchester.

This is a fast-moving investigation and we have significant resources deployed to both the investigation and the visible patrols that people will see across Greater Manchester as they wake up to news of the events last night. This will include armed officers as people would expect. More than 400 officers have been involved in the operation during the night.

To remind you, we were called at 10.33pm to reports of an explosion at the Manchester Arena at the conclusion of an Ariana Grande concert. More than 250 calls came in and emergency services were very quickly on scene. Emergency numbers have been established for anyone who is concerned for loved ones who may not have returned home: 0161 856 9400 or 0161 856 9900.

We have been treating this as a terrorist incident and we believe that while the attack last night was conducted by one man. The priority is to establish whether he was acting alone or as part of a network.

The attacker, I can confirm, died at the arena. We believe the attacker was carrying an improvised explosive device, which he detonated, causing this atrocity.

We would ask people not to speculate on his details or to share names. There is a complex and wide-ranging investigation under way.

Our priority is to work with the national counter-terrorist policing network and UK intelligence services to establish more details about the individual who carried out this attack.'

Our thoughts are with all affected.