The Kremlin said on Wednesday that Russia must be part of investigations into the incidents, while one of Putin's allies said they recalled the US Central Intelligence Agency-backed attacks on oil infrastructure in Nicaragua in 1983.
The price cap plan agreed by Group of Seven wealthy nations calls for participating countries to deny insurance, finance, brokering, navigation and other services to oil cargoes priced above a yet-to-be-determined price cap on crude and oil products.
European Commission chief Ursula von der Leyen for her part said EU countries needed to step up protection of their critical infrastructure by conducting stress tests and using satellite surveillance to detect potential threats.
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