MOSCOW (Sputnik) — Two men were killed by a Garland, Texas police officer on May 3 after they fired at him with assault rifles outside the venue of a cartoon contest. The Islamic State (ISIL) extremist group claimed the gunmen, Elton Simpson and Nadir Soofi, were its "soldiers," although neither of the assailants had trained or received direct guidance from the ISIIL.
According to documents obtained by CNN on Tuesday, Abdul Malik Abdul Kareem is believed to have played a key role in the attack.
US Secretary of Homeland Security Jeh Johnson said a week after the Texas shootings that there was a probability that another lone wolf attack could "strike at any moment."
In January, Islamist gunmen stormed the office of Charlie Hebdo magazine in Paris, known for its cartoons of the Prophet Muhammad. The attack killed 12 people.