Investigators have brought official charges against three suspects in the St. Petersburg metro blast criminal probe, Russia’s Investigative Committee spokeswoman Svetlana Petrenko told TASS on Thursday.

Axar.az reports that "As of now, there are 10 suspects in the criminal case. Three of them, Bakhram Ergashev, Ibragimzhon Ermatov and Makhamadyusuf Mirzaalimov, have been charged with committing crimes under clause b, part 3 of article 205 and part 2 of article 222.1 of the Russian Criminal Code ("A Terror Attack" and "Illegal Acquisition, Transfer, Sale, Storage, Transportation or Carriage of Explosives or Explosive Devices")," she said.

The other accomplices in the terror attack will also be charged shortly, the spokeswoman said.

Investigators are currently working with the affected persons and the severity of harm caused to their health will be established during forensic studies, she added.

"Investigators also continue identifying each of the suspect’s contacts. As part of the investigation, investigators of the Russian Investigative Committee will give a comprehensive and legal assessment of the criminal actions of all the persons complicit in the St. Petersburg metro events, qualifying them in compliance with the norms of Russia’s Criminal Code," the spokeswoman said.