A Member Loyal To The Islamic State In Iraq And The Levant (ISIL) Waves An ISIL Flag In Raqqa.
A member loyal to the Islamic State in Iraq and the Levant (ISIL) waves an ISIL flag in Raqqa June 29, 2014. REUTERS/Stringer

Hours after the United States launched airstrikes in Iraq to destroy ISIS artillery, supporters of the Islamic militants began calling for retaliation against the U.S. They used Twitter in posting their direct threats with the hashtag #Amessagefrom ISIStoUS.

According to reports, the hashtag has been used at least 50 thousand times, most showing graphic images of decapitated and slaughtered American and British soldiers. Other ISIS supporters posted images of 9/11 attacks as a warning to the U.S. of things to come.

When U.S. President Barack Obama announced "limited airstrikes" in northern Iraq, Islamic jihad and ISIS supporters slammed the president's decision. The online backlash included a warning to the U.S. that ISIS supporters may already be in Washington D.C. Some of the tweets on Twitter had allegedly been sent from the U.S. This coincides with Senator John McCain's statements of the existence of ISIS supporters on American soil.

Threatening pictures have circulated on Twitter with one photo showing the White House as the background and the message, "we are everywhere." The hashtag #AmessagefromISIStoUS came with the photo. Another post addressed the FBI and CIA with the message, "We are in your state, we are in your cities, we are in your streets."

Another ominous tweet read, "This is a message for every American Citizen. You are the target of every Muslim in the world wherever you are." Although the authors of the posts cannot be immediately verified, the messages were meant to strike fear.

McCain told CNN that the U.S. does not consider ISIS a "domestic threat." He added that the government is currently monitoring 100 people who came from the Middle East and fought alongside ISIS.

Meanwhile, in reaction to the #AmessagefromISIStoUS trending on Twitter, Americans and British social media users made their own hashtag #AmessagefromUStoISIS to hit back. Former British Conservative MP Louise Mensch posted a response which read, "Where's Bin Laden now, Bitches? Al Baghdadi will beg for his life and hide behind women too."

Reports said ISIS supporters are distributing flyers to Muslims passing by the London's streets. The leaflets encourage Muslims in London to become jihadists and join the Islamic militants.

One of the individuals who ISIS supporters tried to recruit had tweeted images of sympathizers handing out leaflets around Oxford Circus. Asmaa Al-Kufaishi, the British-Iraqi university student, said the ISIS supporters "racially abused" him. News of ISIS supporters recruiting in the UK has alarmed Muslims in London who want nothing to do with the militants and their "cause."