Ukraine war live updates: Putin dismisses the idea that NATO will be attacked, but warns the alliance's F-16s will be targeted

This is CNBC's live blog tracking developments on the war in Ukraine. See below for the latest updates. 

Russian President Vladimir Putin dismissed the idea that Russia could attack NATO, but he warned that any F-16 fighters given to Ukraine by its Western allies would be legitimate targets for Russian forces.

Speaking to air force pilots Wednesday, Putin said U.S. spending on defense exceeded Russia's and said, "are we, having this ratio, going to fight with NATO, or what? Well, this is just nonsense!" news agency Tass reported.

Asked about the delivery of F-16 jet fighters, which a number of European countries have pledged to deliver to Ukraine, Putin said such combat aircraft would not change the war.

In other news, Ukraine's intelligence chief claimed on Wednesday that Russia was aware that a terrorist attack was being planned since at least Feb.15.

Kyrylo Budanov, the head of Ukrainian military intelligence, told a defense forum that Russia knew of a plot to attack it well ahead of the March 22 attack at the Crocus City Hall concert venue in Moscow, in which 143 died. He did not present evidence for his claims.

Ukrainian forces shot down 26 out of 28 attack drones launched overnight by Russia, Kyiv's military said on Thursday. The Iranian-made drones were destroyed over parts of eastern, southern and southeastern Ukraine, the air force added.

The Zaporizhzhia region's governor said on Telegram that two women had been wounded when debris struck a residential neighbourhood in the regional capital.

Prosecutors in the eastern Kharkiv region said a restaurant, a store and offices were damaged by debris from three drones.

The air force added that Russia's overnight attack included several types of missiles. The