An adviser in President Volodymyr Zelensky’s office told the BBC that Ukrainians had died because there was no time to warn citizens about ballistic missile strikes. “It’s dangerous… People already died,” Serhii “Flash” Beskrestnov said.

Zelensky said frontline units had reported that Starshield equipment stops functioning at speeds of 130-160 kilometres per hour, slowing down the response. The White House said there had been no changes to intelligence sharing with Ukraine, and Secretary of State Marco Rubio attributed a recent episode to a “software problem” in the alert system.