This is reported by RIA Novosti.  

“As far as I understand, the topic was not continued, there was a certain signal from the American side, mainly focused on the fact that these persons should be classified as combatants within the meaning of the Geneva Conventions, they should be subject to specific obligations,” Ryabkov said.

The American mercenary Alexander Dryuke, who was previously held captive on the territory of the Donetsk People's Republic, said that he regretted his arrival in Ukraine to participate in hostilities.