MOSCOW, June 20. /TASS/. Two US mercenaries captured in Ukraine should take responsibility for their crimes that have to be investigated, Kremlin Spokesman Dmitry Peskov said in an interview with the US MSNBC news channel on Monday.

"They are soldiers of fortune, and they were involved in illegal activities on the territory of Ukraine. They were involved in firing and shelling our military personnel. They were endangering their life and they should be held responsible for those crimes that they have committed," Peskov said.

"Those crimes have to be investigated," he added.