Members of the so-called Five Eyes spy alliance, as well as Israeli and Saudi officials, fear the identities of foreign assets could inadvertently be shared with Moscow.

CIA Director John Ratcliffe said Wednesday that the US has paused weapons and intelligence support to Ukraine, days after President Donald Trump and Vice President JD Vance accused Ukrainian president Volodymyr Zelensky of ungratefulness an prolonging the war in a combative Oval Office meeting.

The suspension, which could cost lives by hurting Ukraine's ability to defend itself against Russian missile strikes, followed a halt this week to U.S. military aid to Kyiv.