Russia said on Monday it was expelling two British diplomats based at the embassy in Moscow over spying allegations that the U.K. called "malicious and baseless."

Russia’s Federal Security Service, or FSB, said in a statement quoted by the state news agency RIA Novosti that the two diplomats had provided false personal data while seeking permission to enter the country and had engaged in alleged intelligence and subversive activities that threatened Russia's security. It didn't offer any evidence.

According to the RIA Novosti report, a decision has been made to revoke the diplomats' accreditations and they have been ordered to leave Russia within two weeks. The Russian Foreign Ministry said in a separate statement that it summoned a British embassy official. “Moscow will not tolerate the activities of undeclared British intelligence officers on Russian territory,” it said.

The Foreign Office in London said in a statement: “This is not the first time that Russia has made malicious and baseless accusations against our staff.” It did not say whether the U.K. planned any retaliatory moves.

Myanmar's military head visits Russia for cooperation talks with Putin

The FSB last year accused seven British diplomats of spying. Six expulsions were announced in September, and one more in November. The U.K. called the moves at the time “baseless.” The expulsions came amid soaring tensions over the war in Ukraine and after London decided to revoke the credentials of an attaché at the Russian Embassy and limit Moscow’s diplomatic activities in Britain.

Last month, London expelled a Russian diplomat in response to the November expulsion.

In May 2024, the U.K. expelled Russia’s defense attaché in London, alleging he was an undeclared intelligence officer, and it closed several Russian diplomatic properties in Britain that it said were being used for spying. Days later Russia reciprocated and expelled Britain’s defense attaché.

Expulsions of diplomats — both Western envoys working in Russia and Russians in the West — have become increasingly common since Moscow launched its invasion of Ukraine in 2022.

UK, France and Ukraine agree to work on ceasefire plan for Russia's war in Ukraine

In 2023, the Russian news outlet RBC said Western countries and Japan had expelled a total of 670 Russian diplomats between the start of 2022 and October 2023, while Moscow responded by expelling 346 diplomats. According to RBC, that was more than in the previous 20 years combined.