The assassination of the self-proclaimed Donetsk People's Republic’s (DPR) leader, Alexander Zakharchenko, was organized by the Ukrainian Special Operations Forces, Zakharchenko's adviser Alexander Kazakov told sputniknews.com.

Axar.az reports that "We have already revealed the initiator — that is the Special Operations Forces. We are likely to name the head of the [assault] group and responsible officer of this structure in the near future," Kazakov said.

He pointed out that several suspects had been detained and already made confessions.

Zakharchenko was killed in a bomb blast at the Separ cafe in downtown Donetsk on August 31. DPR Finance Minister and Deputy Prime Minister Alexander Timofeev, who accompanied Zakharchenko, is in serious condition in a hospital.

According to the DPR Emergencies Ministry, two people were killed and 11 more were injured by the blast. Six of those wounded were hospitalized. A DPR lawmaker told that apart from Zakharchenko his bodyguard had been killed in the blast.

The Russian Foreign Ministry and DPR officials have said that Kiev was behind the assassination. The Security Service of Ukraine (SBU), for its part, has said it was not involved in the murder.