ARIANA Grande has spoken out in a heartbreaking tweet in the aftermath of a 'terror attack' at her concert at Manchester Arena last night.
The singer wrote in a heartbreaking tweet: "broken. from the bottom of my heart, i am so so sorry. i don't have words."
Greater Manchester Police confirmed the incident happened at 10:30pm, on May 22.
A statement released on their Twitter page read: "Just before 10:35pm on Monday 22 May 2017, police were called to reports of an explosion at Manchester Arena.
"This is currently being treated as a terrorist incident until police know otherwise."
Greater Manchester police says 22 people have died, with 59 injured.
Witnesses said they heard two loud bangs near the ticket office at the end of the concert, the cause of which is unknown.
The area around the stadium went into lockdown as authorities continue with their investigations.
One Twitter user wrote: "Honestly worst night of my existence. Just kept running from Manchester Arena for my life."
Another added: "Just got out of Manchester Arena after seeing Ariana perform. There was a loud bang when the lights came on & everyone ran out screaming."
In a statement, the Prime Minister Theresa May said: "We are working to establish the full details of what is being treated by the police as an appalling terrorist attack.
"All our thoughts are with the victims and the families of those who have been affected."
Celebrities in their masses have posted messages of support following the horrific news.
Michelle Keegan wrote: "Horrendous news to wake up to... My heart goes out to everyone who has been effected by this terrible tragedy... I'm in shock. #Manchester."
One Direction star Harry Styles added: "I'm heartbroken over what happened in Manchester tonight.. Sending love to everyone involved. H."
Ariana's friend Taylor Swift added: "My thoughts, prayers and tears for all those affected by the Manchester tragedy tonight. I'm sending all my love."
Phillip Schofield added: "I've just woken up to the horrific news. Sending all my love and thoughts to #Manchester."