The US ambassador to NATO said Monday that the alliance will not move forward with a no-fly zone in Ukraine as it stands, CNN reported.

“Our goal right now is to actually stop the war. We don't want to expand this conflict beyond Ukraine, and so right now, the signal from NATO collectively is that NATO is not prepared to move forward with a no-fly zone,” Julianne Smith told CNN.

Smith did, however, say that members of NATO were taking steps to “provide lethal support to Ukraine and assess their security needs in real time.”

The ambassador said that US officials are discussing with the Polish government the potential for Poland to send MiG-29 Soviet-era fighter jets in support of the Ukrainians.

“That is a sovereign decision for Poland to take. The US has noted that it is willing to sit down and talk through some of the challenges of that. There are a lot of open-ended questions about the number of Ukrainian pilots that are available, how these jets would actually move from Poland to Ukraine. That's all being worked right now,” Julianne Smith said.