Kyrgyz State Committee for National Security questioned the family of the main suspect in Monday’s bomb attack on the St Petersburg metro - Akbarjon Jalilov.
Jalilov's mother, father and brother were questioned by Kyrgyz security officers in the city of Osh, Interfax reported.
Earlier, a spokesman for Kyrgyzstan’s State Committee for National Security (UKMK) said that a Kyrgyz-born Russian citizen named Akbarjon Jalilov was the main suspect.
UKMK spokesman Rakhat Sulaimanov said the suspect was born in the southern Kyrgyz region of Osh in 1995.