Ukraine’s General Staff said on social media that the oil terminal in Feodosia, on the south coast of the Russia-occupied Crimean Peninsula, has been supplying the Russian army with fuel and that the strike was part of an ongoing effort to “undermine the military and economic potential of the Russian Federation.”

Ukraine successfully attacks a major Russian oil terminal in Crimea, prompting warnings from Russia and escalating tensions in the region.

Residents in Feodosia said a series of powerful blasts rocked the coastal Black Sea city around 4:30 a.m. local time and sent pillars of flame and smoke into the sky.