The Prosecutor General's Office of Ukraine (PGO) continues to conduct an extradition check on Russian citizen Magomed Dukuzov, who was detained in Kyiv on suspicion of involvement in the killing of Paul Klebnikov, the editor-in-chief of Forbes Russia, Deputy Prosecutor General Yevhen Yenin has told Interfax-Ukraine.

"The extradition check continues, but there are a number of nuances that concern the criminal proceeding against the defendant," he said on Monday, December 18.

Earlier, he said that an extradition check was underway. The Prosecutor General's Office gave an instruction to detain Dukuzov in Ukraine as part of extradition at the request of Russian law enforcement officers.

On November 18, 2017, officers of the Security Service of Ukraine (SBU) detained a Russian citizen in Kyiv, who was wanted by Interpol for involvement in the murder of the editor-in-chief of Forbes Russia, U.S. citizen Klebnikov. According to Interpol, a Russian of Chechen origin is also involved in the killing of a deputy head of the government of the Chechen Republic in 2001-2003.

On the same day, a source told Russia's Interfax that Kazbek Dukuzov, wanted by Russian law enforcement agencies for a number of contract killings, including Klebnikov, could be a Russian citizen.

"Russian law enforcement agencies are preparing to send a request to Ukraine," the source said.

On November 20, Interior Ministry spokesperson Irina Volk confirmed that Kazbek's brother, Magomed Dukuzov, had been detained in Kyiv at the request of Russian law enforcers.