Two more suspects, apart from Zaur Dadayev and Anzor Gubashev, were arrested on suspicion of involvement in the murder of Russian politician Boris Nemtsov, a spokesman for the Security Council of Russia's Republic of Ingushetia told RIA Novosti.
Earlier on Saturday, Russian Federal Security Service (FSB) Director Alexander Bortnikov announced that Zaur Dadayev and Anzor Gubashev were arrested on suspicion of the murder of Nemtsov. Both suspects are from the Caucasus region of southern Russia.
Among those detained were "Zaur Dadayev, who is the deputy commander of a unit of 'Sever' battalion of the Chechen Republic Ministry of Internal Affairs and another man who was with him in the car at the moment [of the arrest]. Anzor Gubashev who worked in a private security company in Moscow and his younger brother were also detained," Albert Barakhoyev told RIA Novosti.
Nemtsov, 55, was fatally shot in central Moscow late last Friday.
Shortly after the tragedy, Russian President Vladimir Putin ordered the Russian Investigative Committee, the Interior Ministry and the FSB to set up a joint investigative team to investigate the murder.