WATCH: Pentagon video shows Russian fighter jet dumping fuel on U.S. surveillance drone

Pentagon releases video of what it says was Russian jet dumping fuel on U.S. drone.

Poland says it's giving Ukraine a dozen MiG-29 fighter jets.

Russia says its fighters didn’t strike the drone and claimed the unmanned aerial vehicle went down after making a sharp maneuver.

The incident raises tensions between Moscow and Washington over the Ukraine conflict.

Polish government spokesman says some other countries with MiGs also pledged them to Kyiv.

Ukraine had several dozen MiG-29s inherited in 1991, but it’s unclear how many of them remain in service after more than a year of fighting.

Poland also was the first NATO nation to give Ukraine German-made Leopard 2 tanks last month.