Russian police have arrested another two men over the killing of opposition activist Boris Nemtsov, who was gunned down in the centre of Moscow, state media reported Sunday, bringing the number held to four.
Albert Barakhoyev, secretary of the Security Council of Russian republic of Ingushetia told state news agency RIA Novosti that the pair had been taken into custody over the assassination of the 55-year-old former prime minister. One of them was the younger brother of Anzor Gubashev, whose arrest alongside Zaur Dadayev was announced by Russian security officials on Saturday.