ISIS supporters celebrate terror attack on social media as Twitter confirms tweet 'predicting' Manchester attack was posted AFTER the bombing

• ISIS fans have been celebrating the Manchester Arena terrorist attacks online 
• One video purports to show ISIS supporter praising Manchester terror attack
• One Twitter account posted a threat to Manchester four hours before the blast 
• ISIS has since claimed responsibility for worst terror attack on UK soil since 7/7
• 22 people have been killed and almost 60 wounded during the terrorist attack

By DARREN BOYLE and JAY AKBAR FOR MAILONLINE

PUBLISHED: 23:51 EDT, 22 May 2017 | UPDATED: 11:52 EDT, 23 May 2017

 
 
 
 
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ISIS supporters have been praising the Manchester Arena terror attack in which 22 were killed and another 119 wounded.

Terrifyingly, two tweets appeared to predict the suicide bombing at an Ariana Grande concert attended by thousands of children last night.

Twitter has since confirmed the tweet which read 'Are you forget our threat?' and included a #ManchesterArena hashtag was posted after Britain's deadliest attack since 7/7. 

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A Twitter account - which was unverified - posted this four hours before the attack

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A sickening video purports to show a jihadist celebrating the Manchester terror attack