The National Anti-corruption Bureau of Ukraine (NABU) has opened a criminal case involving the possible illegal enrichment of the head of the Prosecutor General's Office (PGO) Yuriy Lutsenko, NABU's press secretary Svetlana Olyfira said, according to the Kyiv-based edition Ukrayinska Pravda.

"Pursuant to court order, which mandates entering the case into the unified case register, the information has been entered and an investigation into alleged illegal enrichment has begun," she said.

Olyfira said the case involves Lutsenko and was opened pursuant to Part 3 of Article 368-2 of Ukraine's Criminal Code (illegal enrichment). She added that the requisite ruling was made by Kyiv's Solomiansky District Court in October.

Earlier, former deputy PGO chief Renat Kuzmin said on his Facebook page that the case had been opened at his written request.

"Pursuant to my statement, NABU registered the case and began a criminal investigation into PGO chief Lutsenko's illegal enrichment," he said, and posted a copy of his letter to NABU.