British police have said they are treating the blast at the Manchester Arena at the end of a concert by USA singer Ariana Grande as a "terrorist incident".
"Everyone pls share this, my little sister Emma was at the Ari concert tonight in #Manchester and she isn't answering her phone, pls help me", said one message posted alongside a picture of a blonde girl with flowers in her hair.
Meanwhile, fellow artists including Cher, Ellie Goulding and Katy Perry have tweeted their prayers and thoughts for victims of the Manchester Arena incident during Ariana Grande's Dangerous Woman show following the news that several concertgoers were confirmed killed and several injured after "explosions" rocked the arena.
A fatal blast occurred outside Manchester Arena right after the end of a concert late Monday night, the police confirmed early Tuesday.
British Prime Minister Theresa May said the government was working to establish "the full details of what is being treated by the police as an appalling terrorist attack". Calvin Welsford, an 18-year-old concertgoer, said that he heard a "loud bang" a couple of minutes after Grande's set had finished.
A woman who brought her daughter to the Arena last night told Sky News that the venue was "full of handsome girls... and families". "Kids were crying, mums were picking their kids up and running for the exits - there were people lying injured and being trampled on as everyone tried to get out".
Manchester's Victoria station, which backs on to the arena, was evacuated and all trains and trams cancelled.
A rep from Ariana's USA label has confirmed the singer is OK.More news: Wenger's future at Arsenal will be decided after FA Cup final
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Armed police work at Manchester Arena.
Officials are investigating the incident as a possible suicide bombing.
People running down stairs as they attempt to exit the Manchester Arena after a blast, where USA singer Ariana Grande had been performing, in Manchester, Britain in this still image taken from video May 22, 2017.
"Please stay away from the area", Greater Manchester Police officials said on Twitter. Surely there is no crime more reprehensible than the murder of children.
"At this time, we have no information to indicate a specific credible threat involving concert venues in the United States", a statement read.
Police treating event as suspected terrorist incident. I'm still finding bits of God knows what in my hair. "When we left [the main arena] there was smoke and people lying on the floor". "It makes it a little more realistic", she said.
According to TMZ, the singer is now suspending the remainder of her tour, which is scheduled to resume in London on Thursday. It is on behalf of the team here at GazetteReview that we offer our sincerest condolences to any and all affected by this bad attack, and our thanks to all emergency services workers involved.