BRUSSELS/WASHINGTON -- Ukraine's failure to intercept a single Russian missile during a large-scale overnight attack this week has raised fresh concerns over Kyiv's dwindling supply of air-defense interceptors as Moscow escalates its ballistic missile strikes on the nearly defenseless capital and other regions.Ukrainian President Volodymyr Zelenskyy has warned that deliveries of anti-ballistic interceptor missiles from partner countries have fallen sharply, leaving Ukrainian vulnerable to deadly attacks that are being launched by Russia with increasing frequency.Following a meeting with Ukraine's military leadership on protecting critical infrastructure on August 2, Zelenskyy said Ukraine had received only a third as many air-defense interceptors this year compared to the same period in 2025."Our partners have the missiles. What is needed are the necessary political decisions on deliveries and on accelerating production, including localization in Ukraine," Zelenskyy said.Latvian Foreign Minister Baiba Braze, who was in Kyiv during the most-recent attack on August 5, condemned Russia's latest strikes, which lit up the late night skies with balls of flames from massive explosions."It was a vile attack on Ukrainians. I was hiding in the shelter along with a number of them and admiring their resilience. Russia is a terrorist state and needs to be contained," she wrote on X.Ukrainian Foreign Minister Andriy Sybiha also urged allies not to slow military assistance.Speaking on August 5, he said: "Russian strikes take no summer vacation; support for Ukraine and pressure on the aggressor must not pause, either. Every interceptor counts. They are life-saving tools."US Stockpile QuestionsPatriot interceptor missiles remain Ukraine's most effective defense against Russian ballistic missiles, but questions are growing over how many additional interceptors Washington can realistically provide.Last week, the Center for Strategic and International Studies (CSIS) estimated that the United States has used more than half of its Patriot PAC-3 MSE and THAAD interceptor inventories during its military operations against Iran this year.The report estimated that US stocks of Patriot PAC-3 MSE interceptors have fallen from more than 2,300 before the conflict, which began in February, to roughly 800, while THAAD interceptor inventories have been nearly halved.