Russia on Wednesday accused Ukraine’s Western allies of helping plan and conduct last week’s missile strike on the Black Sea Fleet’s headquarters on the annexed Crimean Peninsula.

“There is no doubt that the attack had been planned in advance using Western intelligence means, NATO satellite assets and reconnaissance planes and was implemented upon the advice of American and British security agencies and in close coordination with them,” Russian Foreign Ministry spokeswoman Maria Zakharova said at a briefing.

Moscow has repeatedly claimed that the U.S. and its NATO allies have effectively become involved in the conflict by supplying weapons to Ukraine and providing it with intelligence information and helping plan attacks on Russian facilities.