Russia's Federal Security Service (FSB) office in the city of Aksai, Rostov Region, arrested a Russian military serviceman on suspicion of high treason.

It's the Ukrainian military intelligence that has allegedly recruited the military, security officials claim, according to the FSB press service.

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The man was tasked with gathering military secrets, whose leak to a foreign government could "damage Russia's defense capability", the report says.

Investigative actions are underway.

As UNIAN reported earlier, Russian puppet occupation authorities in Luhansk sentenced a local resident to 12 years for "espionage in favor of Ukraine."