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Director General of MI5 Ken McCallum speaks at Thames House, the headquarters of the UK's Security Service in London, Britain, on Tuesday. Reuters
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Firstpost•14-10-2026, 00:48
MI5 Warns Iran Targets Harder UK Sites and Russia Intensifies Hybrid Warfare
  • •MI5 Director General Ken McCallum warned that Iran is escalating attempts to strike harder targets such as military sites in Britain.
  • •State threats against the UK have quadrupled over the past decade, with MI5 dedicating more resources to the issue than during the Cold War.
  • •Over the past year, operations linked to Iran have resulted in more than 50 arrests across the UK.
  • •McCallum stated that Russia remains the aggressor number one, intensifying hybrid warfare tactics against Western allies.
  • •MI5 is particularly concerned about terrorists misusing artificial intelligence to develop dangerous bioweapons and new pathogens.

Key Questions Answered

MI5 Director General Ken McCallum warned that Iran is escalating attempts to target harder assets like British military sites, while Russia is intensifying hybrid warfare and hostile acts against Ukraine's allies. McCallum noted that state threats have quadrupled over the past decade, and Russia remains the leading aggressor in Europe through tactics such as cyberattacks and sabotage attempts.

British Prime Minister Andy Burnham stated that Tehran was highly likely behind a suspected plot against RAF Fairford, an airbase used by US bombers to carry out strikes on Iran. The security alert prompted US President Trump to withdraw planes from the air base, while Iran has rejected accusations of involvement.

McCallum warned that artificial intelligence is supercharging the cybersecurity contest and being exploited by terrorists for improved reconnaissance and attack methodologies. The intelligence chief emphasized that the greatest concern regarding AI misuse is its potential to help develop bioweapons or create new pathogens.