Ukrainian drones struck a power plant in Russian-occupied Crimea and targeted additional sites in the Moscow region overnight, according to reports from The Moscow Times and Channel News Asia.

The strikes mark a significant escalation in attacks on Russian energy infrastructure, following recent Ukrainian claims of responsibility for a drone hit on an oil refinery in Moscow itself.

Brent crude prices held firm in early trading as investors weighed the renewed threat to Russian energy production and logistics.

The market has already priced in a degree of geopolitical risk, but direct hits on power generation and refining capacity in key regions like Crimea and the capital's vicinity raise the stakes for potential supply disruptions.

Traders are monitoring whether these strikes will lead to sustained outages or force Russia to divert resources from frontline operations to domestic defense.

The attacks underscore Ukraine's expanding reach and its strategy of targeting the economic and logistical backbone of the Russian war effort.