MOSCOW/DUSHANBE—Russia remanded in custody on Tuesday a Kyrgyzstan-born man suspected of involvement in Friday’s mass shooting at a Moscow concert hall, and sent investigators to Tajikistan to question the families of four men charged with carrying out the attack.
Eight suspects have now been remanded in pre-trial detention since gunmen sprayed concertgoers with bullets in the deadliest attack in Russia in two decades, days after President Vladimir Putin celebrated an election that handed him a fifth term.
