The U.S. Embassy in Moscow issued a Russia and Ukraine continue to escalate.
On Friday, Ukraine struck an oil refinery in southern Russia, ending a two-week pause on energy infrastructure attacks brokered by President Donald Trump between the warring nations.
The previous day, Russian drone and missile strikes in Ukraine killed at least 27 civilians, according to the Wall Street Journal.
Fox News Digital contacted the U.S. Embassy in Moscow for further information.
This is a developing story. Please check back for updates.