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Which explosive material was used in the attackers’ suicide belts?

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Map of central Paris showing locations targeted during the November 13, 2015 attacks, marked with numbered circles. The map includes symbols for explosion and shooting locations and outlines the city boundary. A timeline on the left lists each attack site and event details, including Stade de France, Rue Alibert, La Casa Nostra, La Belle Equipe, Bataclan, Cafe Comptoir Voltaire, and Saint-Denis. — Paris attacks of 2015 Significant sites related to the terrorist attacks in Paris on November 13, 2015.

The suicide belts used by the attackers during the November 13, 2015, Paris attacks were improvised explosive devices constructed using the highly unstable explosive compound triacetone triperoxide, combined with shrapnel such as nails and ball bearings.1