Britain is facing a “staggering rise” in attempts at assassination, sabotage and other crimes on U.K. soil by Russia and Iran, as the two states recruit criminals to “do their dirty work,” the head of the U.K.’s domestic intelligence agency said Tuesday.

MI5 Director General Ken McCallum said his agents and police have tackled 20 “potentially lethal” plots backed by Iran since 2022 and warned that it could expand its targets in the U.K. if conflicts in the Middle East deepen.

The spy chief said if the crisis escalates with Israel launching a major attack in response to Iran’s recent missile barrage, there is the risk “of an increase in — or broadening of -– Iranian state aggression in the U.K.”