Ukraine says it has captured two Russian servicemen and they will be prosecuted for “terrorist acts,” Euronews reported on Monday.

In a video, posted by Kiev’s interior ministry, one of the alleged servicemen appears to say he has been on a spying mission from the central Russian town of Togliatti.

“Two Russian troops were captured indeed. They are being questioned by our authorised investigators. I have no further information so far,” said Andriy Lysenko, a Ukrainian military spokesman.

Kiev accuses the two men of being part of a special forces group that killed and wounded Ukrainian troops. It wants to boost accusations of direct Russian military involvement in the separatist conflict.

Moscow denies having any troops in Ukraine.