Ukraine is finishing the preparation of the fourth lawsuit filed with European Court of Human Rights (ECHR) against Russia, Ukrainian Justice Minister Pavlo Petrenko has said.

"I'd like to announce the filing of the fourth international lawsuit against Russia with the ECHR by Ukraine," he said at a press conference in Kyiv on Tuesday.

According to him, documents on the lawsuit will be finished next week.

It will concern the violation of human rights in annexed Crimea, in particular on the political motives behind the persecution of Ukrainian on the peninsula.