President Zelenskyy told his officials to stop leaking information about the war tactics of his country.
Zelenskyy said it was irresponsible to give out information about military operations to the media.
Several unnamed Ukrainian officials spoke to news outlets about a surprise strike in Russia-occupied Crimean.
Major gaps in Russia's air defense systems were highlighted by the destruction of as many as 13 Russian warplanes at a naval air base.
Russia downplayed the damage and tried to attribute it to an accident.
The New York Times cited unnamed Ukrainian officials who said that their country had carried out the attack.
Satellite-imaging companies took aerial photos of the damage and it was clear that Russia's explanation wasn't true.
Zelenskyy said the people giving out such information were more interested in glory than victory.
The general rule is that war is not a good time to make statements. He said that the less concrete details you give about our defense plans, the better it will be.
He said that those who want to see Ukraine win the war should be responsible for every word they say about the state's preparation.