Investigators on Thursday detained a suspect from a deadly September explosion at a Vladikavkaz market who was preparing another bombing, the Investigative Committee said.
The suspect, identified as Yusup Dzangiyev, was detained in Ingushetia.
Investigators have identified seven other people suspected of involvement in the Sept. 9 suicide bombing that killed 19 people and left more than 200 injured.
Three suspects, Ali Daurbekov, Magomed Latyrov and Islam Khashagulgov, were detained earlier this fall.
The other four suspects were identified as Vakha Khashagulgov, Khizar Daurbekov, Umar Dzaurov and Ibragim Daurbekov.