"The Investigative Committee seeks the arrest of five persons involved in the murder of Boris Nemtsov. The investigation is continuing," Vladimir Markin wrote on his Twitter page.
Zaur Dadayev and Anzor Gubashev were detained early Saturday in connection with Nemtsov's assassination. Later in the day, reports emerged that two more alleged accomplices from southern Russia's Caucasus region have been apprehended. One of the detained, according to the region's Republic of Ingushetia Security Council spokesman, was Gubashev's younger brother.
Nemtsov, 55, who once held high positions in the Russian government in the late 1990s, 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 Federal Security Service to set up a joint team to investigate the murder. Investigators have been pursuing several motives behind Nemtsov's murder, including possible links to the Ukrainian crisis, contract killing or business-related disputes.
