More from WSJ:

"The Ukrainian Air Force confirmed that the Ukrainian Armed Forces do have a shortage of anti-aircraft guided missiles.
This was stated by Air Force spokesman Yuri Ignat, commenting on The New York Times article that the United States will soon not be able to supply Ukraine with Patriot missiles.

"It is clear that there is a shortage of anti-aircraft guided missiles, and no one is hiding it. That is why there are such concerns in the Western press. I think that our Western partners are well informed about the state of affairs with our air defense systems," Yuri Ignat said on the telethon.

He said that the Ukrainian Armed Forces spent a lot of missiles to repel the last three massive Russian attacks on December 29, January 2 and January 8."