DONETSK, February 18. /TASS/. The Ukrainian military has deployed a group of Polish mercenaries to the frontline near the settlement of Konstantinovka in the Donetsk People’s Republic (DPR), a source in Russian defense circles told TASS on Tuesday.

"The enemy has deployed Poles in one of the areas in the Konstantinovka direction. This is quite a large group," the defense source said.

The mercenaries are well prepared and equipped, he added.