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Forensic investigators work outside a London market following an attack which left 7 people dead. Peter Nicholls

Saturday’s terror attacks in London involved two everyday items now increasingly associated with terrorism, a truck and a knife. The three terrorists rammed pedestrians on London bridge with a van before going on a stabbing spree at a nearby market, killing seven and injuring dozens.

And it was far from the first time a vehicle was used to promote terror.

In Nice, France, last summer 86 people were killed when a cargo truck rammed into crowds celebrating Bastille Day. A truck was driven through a holiday celebration in Berlin killing 12 last Christmas. In November, an Ohio State University student rammed his car into fellow students and went on a stabbing attack in Ohio. Last month, a person hijacked a truck and killed five in Stockhom, Sweden.

Read: London Terror Attack: Mayor Sadiq Khan Dismisses Trump's Misleading Tweet​

So how did cars and knives become tools for terrorism? Part of the reason could be because it was promoted by the magazine of the Islamic State Group, also known as ISIS.

The English language publication, called “Rumiyah,” is targeted at the Western World and was first published in 2016. The eighth edition was released in April of this year and features several articles specifically about how to attack people with knives and cars.

The magazine has a full page detailing the perfect kind of truck for attacks, a box truck, and the best ways to acquire one. The magazine lists among the ideal targets as large outdoor festivals, conventions, parades, outdoor markets and congested streets.

The magazine promotes several grim ways to kill people to cause the most terror.

“It is likewise one of the most appropriate methods to apply for the one seeking to slaughter large numbers of (people) while armed with something as simple and easily attainable as a knife,” reads the magazine.

Some of the plans include more traditional techniques and explains the best ways to acquire guns and take hostages. The London and Ohio State attacks mirror very closely a technique recommended by the magazine.

Security experts and leaders are struggling with coming up with ways to cope with these lone wolf style attack. London Mayor Sadiq Khan accused Prime Minister Theresa May of underfunding police in the capital.

Read: Should Facebook, Google Censor Extremist Content? Australian Leaders Ask Tech Companies To Fight Terrorism

U.S. president Donald Trump made security and fighting terrorism a key campaign issues and even aimed to address the issue with his travel ban, though the moves is currently being blocked by courts. Trump’s methods coming as a departure from efforts by former President Barack Obama.

The New York Times reported Tuesday that tensions and fear are palpable in Europe, the same night as the London attack a fire cracker near a soccer stadium caused a stampede that injured 1,500 people.