The European Union and the U.K. announced on Monday new coordinated sanctions on Russia over cyber attacks in Europe, accusing Moscow's FSB intelligence agency of involvement in digital strikes.

The move comes as Western officials warn Russia has stepped up its "hybrid" campaign to destabilize Europe over four years into the war with Ukraine.

Brussels said it was imposing sanctions on nine people and four entities, while London said it was adding 24 names to its blacklist.

The British government said the sanctions – the first joint cyber package with the EU – "target the Russian state's persistent and increasingly reckless attempts to sow chaos and division across Europe."

Among those subjected to asset freezes and visa bans were officers of Russia's GRU military intelligence agency, and alleged "cybercriminals" working together with the Russian state.