Al Qaeda magazine contains an 18-page guide on how to build a tool that could derail trains.

The terrorist group singled out Britain, France, and America as targets.

Train derailments are "not a martyrdom op" and "can be repeated," the magazine said.

Al Qaeda in the Arabian Peninsula (AQAP) has dedicated an entire edition of its magazine to teaching followers how to derail trains in Europe and the US for future terrorist attacks.

In a guide published on Sunday in the 17th edition of Inspire, AQAP's online-only English-language propaganda magazine, the terrorist group wrote:

"For more than a year this idea has been extensively been researched by a group that has dedicated most of its efforts and time to come-up [sic] with a profound yet simple method in designing this tool.

"So that the Lone Mujahid [someone engaged in jihad] can carry along with him in his fight to bring great destruction upon the West's security, military and economy — by the Help of Allah.

"We now leave you with this exciting and interesting issue."

In Sunday's 94-page issue, the terrorist group's writers outline different methods to derail trains, train routes to target, among other advice. The electronic magazine also has a spread containing "words of wisdom" from various Mujahideen, including Osama bin Laden.

The magazine also features a detailed 18-page-long guide on how to build a "derail tool" with cardboard, an empty plastic container, part of a rubber tyre, pipes, iron wires, screws, sheet metal, and cement. The apparatus does not require any electronic or construction tools so followers can "remove any traces for suspicion."

When placed on train tracks, the tool is expected to interfere with the train's movement and cause it to divert from its tracks.

As the perpetrator does not physically need to be on the train during the derailment, the operation "is not a martyrdom op" and "can be repeated," the magazine said. It will also be "easy to hide your tracks from forensics" after the attack, it boasted.

How the tool will look, according to the magazine's guide. Inspire via Jihadology

In the magazine, the terrorist group singled out Britain, America, and France as countries that "have shown open hostilities towards Muslims," and encourages followers to carry out attacks in those countries.

Some 1.7 billion passenger journeys were taken in Britain in 2016, according to the latest Office of Rail and Road statistics.

The British Department for Transport did not immediately respond to Business Insider UK's request for comment, and the Home Office declined to comment. The Telegraph, however, quoted Whitehall sources who described rail travel as "one area of public transport which is worryingly yet to be exploited."

The New York Police Department sought to quell fears after the magazine's publication, tweeting on Sunday that its "robust multi-layered counterterrorism apparatus" covers railways.

AQAP is believed to be linked to the July 7, 2005 bombers, who killed 52 people in a series of suicide bombings in central London. In 2004, terrorists linked to the group also killed 191 people and wounded another 1,800 in four consecutive bomb attacks on commuter trains in Madrid.

Former MI5 chief Lord Evans warned last week that Britain was likely to face 20 to 30 more years of terrorist threats.

Inspire, which first published in 2010, is AQAP's first English-language propaganda magazine. The online-only magazine primarily aims to reach the terrorist group's western followers, according to American intelligence platform Stratfor. It has previously issued guides on how to make homemade car bombs or torch parked vehicles, among others.