Amid a second video posted by the Islamic State of Iraq and Syria (ISIS) on Friday showing the beheading of a Kurdish Peshamar fighter, a report on the same day by Judicial Watch warned that members of the extremist militant group are in Mexico and preparing to attack the US.
The group is in Ciudad Juarez, located across El Paso in Texas and a known crime-infested narcotics hub, which serves as base of the Islamic jihadists. They plan to use bombs or improvised explosive devices planted in vehicles, the report said.
Judicial Watch reported that intelligence officials have heard radio talk as well as chatter from Islamist terror organisations which are allegedly planning attacks outside the US as the world observes the 13th anniversary of the 9/11 attack.
Because of the warning, US federal intelligence officials from different agencies are on alert over reports that terror groups such as ISIS and al Qaeda could be part of the border attack.
Also on Friday, British upgraded the country's terror threat level to "severe" from "substantial," which means high chances of a terrorist attack on the UK, based on a decision by the Joint Terrorism Analysis Center. Home Secretary Theresa Mays pointed to developments in Iraq and Syria as reasons for the change in threat level.
"We face a real and serious threat in the U.K. from international terrorism. I would urge the public to remain vigilant and to report any suspicious activity to the police," The New York Post quoted Mays.
She said some of the threats would likely come from British and other European fighters who have traveled to the Middle East to join the jihadists.
British Prime Minister David Cameron also appealed to Britons to help identify terrorist amid growing extremism in the UK.