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Armed police maintain roadblocks and security checks around RAF Fairford in England on Sept. 28.Leon Neal/Getty Images

Canada is joining more than two dozen other countries in denouncing Iran’s apparent involvement in a planned attack on an air base in England.

The countries say in a joint statement they “condemn in the strongest terms Iran’s use of violent attacks.”

British Prime Minister Andy Burnham said Monday that a suspected terror plot at a U.S.-run military air base last month was “almost certainly” directed by Iran’s Revolutionary Guard.

The RAF Fairford air base has been used by American bombers to strike Iran in the ongoing war.

Iran’s IRGC likely behind incident at U.S.-run air base, British PM Burnham says

The countries that signed the joint statement say any attempt by Iran to threaten individuals on their territory through proxies is unacceptable.

The signatories include the United States, France, Germany and Australia, among others.