The View fans were left well and truly shocked after the lead singer told his fellow bandmate 'I’ll f***ing kill you' during a heated on-stage brawl.
The frontman took a swing at the bassist whilst mid-performance at Manchester's Deaf Institute last night (10 May).
The sold-out concert was then cut short, leaving audiences utterly baffled at what they had just witnessed.
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The Scottish indie rock band, best known for or their 2007 hit single 'Same Jeans', which reached number 3 on the UK Singles Chart, got into quite the kerfuffle last night.
The band graced the stage as part of their eagerly anticipated comeback UK tour, but the gig soon took a turn when lead singer, Kyle Falconer, threw a punch at bassist, Kieran Webster, before threatening his life.
According to fans, the whole thing kicked off when Webster swapped with Falconer to become the lead singer for a few tracks and it was when the bass player was walking back to his old position that he kicked the mic.
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Falconer can be heard shouting: "I'll f***ing kill you," as other members of the band attempt to hold him back.
Shocking crowd footage then shows the singer returning to the stage after a break to sing some acoustic numbers where he addresses the incident.
He said: "If you want, I think you should maybe ask Kieran to come up and finish the set. The problem with this band is he wants to sing the songs and he can't, right."
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The View have since issued a statement to Twitter this morning (11 May) and postponed their London gig which was scheduled to take place this evening.
It read: "Unfortunately we are having to postpone tonight's London show.
"Our promoter is working to resolve the situation. Please keep hold of your tickets for now and we will make a further announcement in a few days.
"Massive apologies to all our fans."
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Fans that were looking forward to a cracking show clearly got more than they bargained for, as one fan, Jason Daniels, was left in complete disbelief at the whole ordeal.
The 39-year-old claims that he noticed bickering between Falconer and Webster before the latter kicked a microphone stand.
Daniel said that the packed venue was 'stunned to silence' during the brawl but chatter soon turned to whether they'd be getting a refund as they left.
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The dad-of-three admits he was disappointed that he didn't get to see one of his favourite bands complete set, but said the incident was 'real rock n' roll'.
The Sale resident recalled: "It was proper rock n roll. Kyle just flipped. It was your typical playground altercation.
"I was surprised by it. I've been to gigs in the past where stuff's happened but nothing like that.
"It was bittersweet because we missed half the gig, so I was half p***ed off but then I was thinking 'we've seen something mental there'."
While Daniel and other fans alike 'don't know' if they'll receive a refund, he admitted that he wasn't that bothered about it.
He said: "I'm not fussed about it but people were talking about it."
The band's representatives declined to comment further.