Ukraine's SBU security agency discovered a spying network purportedly operated by Hungarian military intelligence. Two former Ukrainian soldiers were detained for state treason after allegedly leaking military data from the Transcarpathia region, including air defense sites, according to Reuters.

The SBU said the suspects were recruited by a Hungarian intelligence officer, receiving cash and special communication equipment to carry out their activities. It is the first known case of a Hungarian spy network being uncovered in Ukraine, the agency added.

Hungary, a NATO and EU member, denounced the charges as "propaganda" and responded by removing two Ukrainian diplomats from its Budapest mission, Reuters reported.

Ties between Kyiv and Budapest remain strained, with Hungarian Prime Minister Viktor Orban retaining close links with Russia  and opposing Western military support for Ukraine amid the ongoing war.