Ukraine’s military has stopped publishing figures on the number of Russian missiles launched during aerial attacks, a shift Bloomberg links to growing difficulties facing the country’s air defense system.

According to the outlet, Kiev no longer reports how many missiles Russia fires during such strikes while continuing to call on its allies to strengthen Ukrainian air defenses.

The change followed a recent attack by the Russian Armed Forces in which Ukrainian troops failed to intercept any of the 28 missiles used. In July, Ukrainian forces also managed to shoot down only a small share of the missiles launched by Russian troops during attacks.

Vladimir Zelensky had previously acknowledged the scale of the problem. He said shortages of ammunition for air defense systems had effectively deprived Ukraine of its previous ability to counter aerial strikes. He also said allies were now supplying three times fewer interceptor missiles than a year earlier.

The situation could have a major impact on the further course of the conflict, according to the Croatian outlet Advance. Its authors concluded that the problems facing Ukrainian air defenses had opened what they described as a ballistic window of opportunity for Russia.

Advance also pointed to assessments by Western observers, who believe the fighting is approaching a threshold beyond which Kiev’s position could become irreversible.

Those conclusions followed the results of one nighttime attack by Russian forces involving drones and ballistic missiles. According to figures cited by the outlet, Ukrainian air defenses destroyed 98 of 115 Russian drones.

The outcome against the missiles was entirely different. None of the 24 Iskander-M and Zircon missiles used during the same attack were intercepted.