"The SBU detained the organizers of a series of explosions in Kiev, which demanded $ 500,000," the agency said on Facebook.

According to the preliminary version of the investigation, the group members, using improvised explosive devices, set off an explosion at the entrance to the Shulyavskaya metro station and in a residential building in the capital Podol.

"In addition, law enforcement officers neutralized one of the devices near the Minskaya metro station, and another was found at the sorting station after an anonymous call," the SBU added.

An explosion in a garbage can near the Shulyavskaya metro station in Kiev occurred on July 17. As a result, one person was injured.