Manchester (UK): A self-proclaimed Islamic State sympathizer tweeted about the Manchester Arena in England, hours before the explosion rocked pop star Ariana Grande's concert on Monday.
The man's Twitter account seemed to have been suspended immediately following the attack.
"Tomorrow night, I will go to the Manchester Arena Grande concert and throw my handmade grenade in there," the person said on a forum.
The man’s Twitter account was suspended immediately following the attack.
Meanwhile, an unverified video has also appeared on the social media purportedly showing a man claiming "loyals" of ISIS were behind alleged 'nail bomb' attack inside Manchester Arena.
The death toll rose to 22 after the blast. "There are children among the deceased" confirms @gmpolice, speaking about the #ManchesterAttack. More than 50 were injured in what is being investigated as a suicide bombing, the most deadly attack in Britain in a decade.
Last time England saw such a deadly terror attack was in 2005 when on July 7, which killed 52 people after terrorists carried out a series of coordinated suicide bomb attacks in central London targeting civilians using the public transport system during the rush hour.
Also, in 2009, the Manchester police had thwarted a major terror bid to attack Manchester's Arndale Shopping Centre on the busy Easter bank holiday weekend.
A student identified as Abid Naseer, 29, who plotted the mass suicide bomb attack was jailed for 40 years in 2015.