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The hackers replaced the website of the Federal Depository Library Program (FDLP) with images of Iran’s supreme leader Ayatollah Ali Khamenei and the Iranian flag. They titled the page “Iranian Hackers” and included a graphic of Donald Trump being punched in the face by a fist from Iran as missiles fly past. Below the President’s bleeding face were the words “hacked by Iran Cyber Security Group Hackers” and “this is only a small part of Iran’s cyber ability”.

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It was also captioned: “Martyrdom was Suleimani’s reward for years of implacable efforts.

“With his departure and with God’s power, his work and path will not cease and severe revenge awaits those criminals who have tainted their filthy hands with his blood and blood of the other martyrs.”

A US government spokesman for the Cybersecurity and Infrastructure Security Agency claimed the website was taken offline soon after the image was posted.

They added there was no evidence the hackers were indeed from Iran.