WASHINGTON -- The U.S. Federal Bureau of Investigation and Homeland Security Department issued a joint bulletin warning of shoe bomb use by terrorists.
The bulletin warned that terrorist groups were trying to use “modified footwear as a concealment method for explosive devices,” CBS News reported Friday.
The agencies said in Wednesday's bulletin that European authorities discovered a pair of shoes in September that were used to transport electric blasting caps across international borders so they could be used in a terrorist operation, ABC News reported.
"A recent terrorist incident involving the international smuggling of electric blasting caps highlights the continuing use of modified footwear as a concealment method for explosive devices," stated the document, which was titled "Terrorist Use of Modified Footwear to Conceal Explosive Devices."
"The shoes were modified in a manner that would make it difficult for security personnel to distinguish them from normal shoes visually." The bulletin said the shoes were hidden in luggage and transported via bus.
"The shoes -- made of leather with thick rubber soles -- were modified so that the insole of each shoe could be removed for access to the hollow interior of the rubber sole," the bulletin said.
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