Sick ISIS posts celebrates ‘blessed London attack’ with ‘Allahu Akbar’ next to horrific photos of the attack Rebecca Taylor

ICSVE cited in Daily Mail

• Messages from an ISIS telegram channel show people celebrating the attack
• The messages read ‘blessed London attack’ and ‘Allahu Akbar’
• Violent extremism experts claim these accounts are credible but unofficial
• There has not yet been any claim made by any terror group for today’s attack 

By REBECCA TAYLOR FOR MAILONLINE

PUBLISHED: 15:37 EST, 22 March 2017 | UPDATED: 21:39 EST, 22 March 2017

Sick ISIS supporters appear to be celebrating the deaths of three people and an attacker in London during a terror attack on Westminster.

Messages have been shared on an unofficial ‘ISIS Telegram Channel’ sharing the news of the attack in Westminster on Wednesday afternoon, with people writing ‘Allahu Akbar’.

According to Ahmet Yayla, a senior research fellow at the International Centre for the Study of Violent Extremism (ICSVE), the messages are being shared on a ‘credible’ ISIS channel.

Shocking mocked-up picture of the Queen Elizabeth clock tower on fire were shared with a stark ‘warning’ that there will be a battle on ‘your land’

He shared screengrabs on his Twitter account, showing content of groups where messages included ‘blessed London attack’.

One user shared pictures of the route the attacker took across Westminster Bridge and into the gates of Parliament, while another shared this website’s headline of ‘Terror at Westminster’.  Video playing bottom right…Click here to expand to full pageLoaded: 0%Progress: 0%0:02PauseUnmuteCurrent Time0:02/Duration Time1:08Fullscreen

• Dramatic videos captures the moment three shots are fired…‘This is what’s wrong with modern society’: Passer-by ‘stops…‘A guy came past me with a big knife and just started…#wearenotafraid: World unites in prayers for London as…

In other apparent messages from supporters, a picture shows a mocked-up image of the Elizabeth Tower on fire. 

The message with the smoke billowing out reads: ‘Soon. Our battle upon your land.

‘Not started yet.

‘Be upon you. Only waiting.’ 

Terror expert Ahmet Yayla explained these channels are not official, but they are credible

The channel users have been sharing maps showing the route of the terror attack as well as the headlines from this website

Rita Katz, director of SITE Intelligence Group, said the lack of media campaign from ISIS could show there was no coordination with ISIS if it was linked with the terror group. 

Similar pro-ISIS ‘channels’ shared blow by blow updates after the attacks in Nice, Paris and Orlando.

ISIS claim on an event can be 24 hours afterwards, and usually not until the attacker is confirmed dead, according to terror experts. 

Other ISIS chat rooms show mocked up images of fighters super imposed over the Houses of Parliament, according to a paper by the ICSVE.

The paper reveals ISIS supporters have been urged and shown how, to carry out attacks with vehicles.