James O'Brien is Leading Britain's Conversation.
23 May 2017, 12:34
A disturbing video has emerged online of an apparent Isis supporter celebrating the Manchester Arena attack, which claimed the lives of 22.
The unverified footage shows an English-speaking man, with his face covered, warning that last night’s horrific events were “just the beginning”.
The Islamic State group is reported to have claimed responsibility for last night's suicide bomb attack at the Ariana Grande concert.
In the video, the man, speaks directly to the camera: “This is only the beginning. The lions of Islamic State of Iraq and Sham are beginning to attack all the crusaders.”
At the end of the short clip, the man holds up a homemade sign, which reads: “Manchester, 2017-05-22”.
Theresa May says Manchester has fallen victim to a "callous terrorist attack".
Speaking outside 10 Downing Street, the Prime Minister said the attacker detonated an improvised explosive device near an exit.
The bomber is believed to have acted alone and police believe they know his identity.