JIHADIS used social media and other internet forums to spread 27,000 new bits of extremist content in the first five months of this year.

Firms such as Twitter, Facebook and YouTube are now hosting 180 new postings per day by ISIS alone.

3 180 new pieces of extremist content are uploaded each day Credit: Alamy

The content ranges from radicalising propaganda to guides on how jihadis can mount crude knife and truck attacks.

Shock figures released by the Home Office reveal the spiralling scale of the problem.

Theresa May will insist tech chiefs plough more of their billions into developing technology to police their sites.

She will say in New York: “As PM, I have visited too many hospitals and seen too many innocent people murdered in my country.

"And I say enough is enough.”

The under-pressure firms set up a global forum to tackle the international blight three months ago, but are yet to announce any hard action from it.

Facebook, Microsoft, Google and Twitter will also make their own announcements today on new investment and more staff training to tackle the scourge.

3 Theresa May will pressure tech giants into investing more money into policing social media Credit: AP:Associated Press

A No10 source added: “These companies have some of the best brains in the world.

"They should really be focusing that on what matters, which is stopping the spread of terrorism and violence. We want them to break the echo chambers.”

ISIS is the world terrorism leader in spreading extremism on the internet.

TWITTER'S TERROR CRACKDOWN TWITTER has suspended nearly a million accounts for promoting terrorism in less than two years, new figures reveal. But the results show a drop-off in the rate during the first half of this year. Twitter claims its own efforts account for the bulk of suspensions, with requests from the Government making up just one per cent – down 80 per cent on last year.

3 Mark Zuckerberg is expected to make an announcement about Facebook's plan to tackle the spread on extremist content on the platform Credit: AP:Associated Press

It has a massive social media operation based in Syria.

The Home Office has taken down 280,000 pieces since 2010 and the security services have also had some success in removing hate content quicker.

Last year the average time that posts remained live was 30 days, but that has now been reduced to 36 hours.

YOUTUBE'S LAX ON HATE VIDEOS MORE than 120 hate videos remained on YouTube last night despite being reported three weeks ago. A probe ordered by Home Affairs committee head Yvette Cooper found 107 jihadi and 94 far-right clips.

But around 60 of each are still there. Ms Cooper said: “They have the resources and capability to sort this. They need to do so fast.” YouTube said: “We’re determined to be part of the solution.”

FACEBOOK'S CHARITY AD'S U-TURN FACEBOOK has done a U-turn and will let an RAF heroes’ charity advertise on it after originally banning their ads. The Sun revealed the internet giant said a campaign by Flying Scholarships for Disabled People breached diversity guidelines by referring to a disability. We also revealed that extremist material was still available on the site — which has now also been removed. Yesterday the charity said Facebook had contacted them and that their ads will be in online within 48 hours. The social network admitted it had made a mistake and made a donation to their cause.