Ukraine claimed Saturday to have struck one of Russia’s largest oil refineries in a drone attack, starting a fire at the facility more than 700 miles into Russian territory.

Fiber-optic drones are highly dangerous, as they can't be jammed with traditional electronic warfare and are difficult to detect.

Russian troops launched 94 drones at Ukraine on the night of January 12. The air defense forces shot down two of them, according to the Air Forces of the Armed Forces of Ukraine. On the night of January 12,

President-elect Donald Trump said he is planning a meeting with Russian President Vladimir Putin, saying he wants to end the "bloody mess" of the Ukraine war.

Russian President Vladimir Putin’s priorities ahead of meeting with President-elect Donald Trump include ensuring Ukraine never joins NATO, according to a new report. Both leaders have indicated that they are ready to meet and discuss ending the nearly three-year-long war in Ukraine.

Russian President Vladimir Putin's main goals in any peace negotiations include prohibiting Ukraine from ever entering NATO and reducing allied military presence in the eastern flank, the Financial Times reported on Jan.