Russia has revoked the accreditation of two British diplomats over alleged intelligence activities, the Federal Security Service (FSB) announced on Monday, the latest in a series of tit-for-tat diplomatic rebukes that was quickly dismissed by London as “baseless.

The Russian government on Monday expelled two British diplomats and gave two weeks for them to exit the country over allegations of espionage. Britain said the allegations are "baseless."

Russia accused two British diplomats on Monday of spying and gave them two weeks to leave the country, reinforcing the downward trajectory of Moscow's diplomatic relations with Europe even as it negotiates to restore ties with the United States.