Secretary of State Antony Blinken said on Sunday that NATO member nations are allowed to send fighter jets to Ukraine as the United States and its allies continue to provide assistance to Ukraine in the midst of the ongoing Russian invasion.

Blinken said on CBS’ “Face the Nation,” on Sunday, that NATO allies sending fight jets to Ukraine “gets a green-light.”

He said, “In fact, we’re talking with our Polish friends right now abut what we might be able to do to backfill their needs if in fact they choose to provide fighter jets to the Ukrainians. What can we do? How can we help to make sure that they get something to backfill the planes that they are handing over to the Ukrainians?”