The United States’ decision to stop sharing military intelligence with Ukraine could make the UK-provided Storm Shadow missiles useless for Kiev in its war against Russia.

In a huge blow to Ukraine forces against Russian troops, US President Donald Trump ordered halting intelligence support for Kiev earlier this week.

“Britain’s long-range Storm Shadow missiles are feared to have been rendered useless in Ukraine after President Donald Trump blocked US intelligence from being shared with allies,” UK’s media reported on Thursday.

The UK-provided Storm Shadow cruise missiles used by Ukraine to strike Russian targets required US intelligence to hit their targets.

Russian officials had pointed out that the Kiev forces lacked the necessary know-how to operate such missiles independently and required aid from US-led NATO specialists as well as intelligence data obtained through the West’s satellite systems to use long-range missiles.

The UK was among those who were banned from sharing intelligence with Ukraine after Trump stopped intelligence support.

“We are pausing, assessing, looking at everything across our security relationship,” National Security Adviser Mike Waltz told CBS News in response to a question on intelligence-sharing with Kiev.

CIA Director John Ratcliffe also confirmed the “pause.”

British intelligence agencies and military units have received an order that explicitly prohibits them from sharing intelligence received from the United States, which was previously known as “Rel UKR.”

It is unclear how many Storm Shadow missiles were provided to Ukraine.

In the meantime, the head of the Ukrainian parliament’s foreign affairs committee, Oleksandr Merezhko, has described the Americans’ foreign policy shift as “unbelievable.”

Russia, however, applauded the US move saying the pause in military aid to Ukraine could help persuade Kiev’s leaders to join the peace process.

“This would probably be the best contribution to the cause of peace,” Dmitry Peskov, Russian President Vladimir Putin’s spokesman, told reporters on Tuesday, according to RIA Novosti.

Relations between the United States and Ukraine broke down dramatically last month, when Trump and Vice President JD Vance engaged in a live argument in the Oval Office with the visiting Ukrainian President Volodymyr Zelensky.