US President Donald Trump meanwhile suggested that Kyiv may have to give up territory in exchange for an end to Moscow's more than 3 1/2-year invasion, in the latest of apparent reversals on how to pursue peace

The Orenburg plant, run by state-owned gas giant Gazprom and located in a region of the same name near the Kazakh border, is part of a production and processing complex that is one of the world's largest facilities of its kind, with an annual capacity of 45 billion cubic meters. It handles gas condensate from Kazakhstan's Karachaganak field, alongside Orenburg's own oil and gas fields

According to regional Gov. Yevgeny Solntsev, the drone strikes set fire to a workshop at the plant and damaged part of it. The Kazakh Energy Ministry on Sunday said, citing a notification from Gazprom, that the plant was temporarily unable to process gas originating in Kazakhstan, "due to an emergency situation following a drone attack"

Ukraine's General Staff said in a statement Sunday that a "large-scale fire" erupted at the Orenburg plant, and that one of its gas processing and purification units was damaged

Kyiv has ramped up attacks in recent months on Russian energy facilities it says both fund and directly fuel Moscow's war effort