An alleged weapons maker for the Islamic State (IS) claimed that a “radioactive device” has been smuggled into an undisclosed location in Europe, according to an intelligence brief released Monday by the SITE Intelligence Group. “A Radioactive Device has entered somewhere in Europe,” according Twitter user Muslim-Al-Britani, who claims to be a freelance jihadist weapons maker now working alongside IS (also known as ISIL or ISIS), according to tweets captured and disseminated by SITE.