KIEV, April 6 – Some of the debts owed by the chemical companies of Dmytro Firtash's Ostchem to Naftogaz Ukrayiny are being collected via the courts, and some have been covered by gas, Naftogaz Ukrayiny Chairman Andriy Kobolev said.

"It has happened; the cases on Firtash's group received a push today. Today the Interior Ministry opened criminal proceedings on enforced recovery: we collected a part of the funds in courts, some of the money was taken via gas, and the rest of the funds will result in a criminal proceeding that was opened several days ago. I hope it will help," he said on the Shuster Live show on 112 television.