Former Ukrainian Prime Minister Pavlo Lazarenko, as well as his former advisor, Petro Kyrychenko, has given his consent to be interrogated by Ukrainian investigators, but the United States is preventing the interrogation of the ex-premier, Ukrainian First Deputy Prosecutor General Renat Kuzmin has said in an interview with the Segodnya newspaper.

"Both Lazarenko and Kyrychenko once agreed to be interrogated by Ukrainian investigators. Kyrychenko is a free man, and nobody can prevent him from coming to our embassy and being questioned. Lazarenko is still in custody. And access to him is the goodwill of the U.S. authorities. We currently don't such goodwill. We're not allowed to question him, and they aren't questioning him at our request. And they're not extraditing him to Ukraine... And here [in Ukraine] he is waiting for a court decision on detention," he said.

Kuzmin also said that during his interrogation on May 15, Kyrychenko confirmed the involvement of former Prime Ministers Yulia Tymoshenko and Lazarenko in the killing of MP Yevhen Scherban.