All Ukrainian troops have been forced from Russia’s Kursk region, Kremlin spokesperson Dmitry Peskov said Saturday. Ukrainian officials have not commented on the claim.

Russian President Vladimir Putin has claimed that his country has regained control of Kursk, the border region where Ukraine launched a surprise offensive last year, though Ukraine’s army says fighting continues.

A senior Central Intelligence Agency official’s son who had joined the Russian military was killed last year during an offensive in eastern Ukraine. The agency said it was a private tragedy and not a national security issue.