An assertion by the head of the UK's MI5 security service that Russia's GRU military intelligence agency is bent on causing ...

Britain’s leading role in NATO’s war against Russia in Ukraine and the military targeting of Iran ensured that McCallum’s ...

Russia's foreign intelligence agency has been on a mission to generate "sustained mayhem on British and European streets", ...

State plots by Russia and Iran are joined by renewed efforts from Islamic State and al-Qaeda, and younger far-right ...

Russian officials just piped up over MI5′s recent warning Moscow agents are looking to cause “mayhem” on British streets and ...

LONDON -- Britain is facing a "staggering rise" in attempts at assassination, sabotage and other crimes on U.K. soil by ...

McCallum added the MI5 had also tackled at least 20 plots of sabotage backed by Iran since 2022. He stressed that MI5 had ...

A security warning from MI5 and a fresh dispute after the "Wagatha Christie" trial lead Wednesday's papers.

In a rare public speech setting out the major threats to the United Kingdom, Ken McCallum argued that hostile states, ...

Nation-state actors are investing aggressively in advanced cyber operations to target government information and technology ...

The risk presented by Islamic State terrorism and hostile states such as Iran and Russia has surged in the last year, the spy ...