About 40 Russian nationals have come under prosecution in Ukraine for participating in hostilities.

"In total, 39 citizens of the Russian Federation, including 31 servicemen of the Russian Armed Forces, have been prosecuted for participating in the unleashing and waging of an aggressive war against Ukraine," Ukrainian Prosecutor General Yuriy told a press conference in Kyiv.

"Indictments have been submitted to court in relation to 10 citizens of the Russian Federation. Of those, six have already been convicted and given from 11-15 years in prison," he said.

However, the Russian authorities have repeatedly said that there are no Russian troops in Ukraine.