This was announced by the NSDC secretary Oleksandr Turchynov, Censor.NET reports citng the NSDC press service.
According to Turchynov, a controlled explosive device of directed action has been used during a peaceful march commemorating those killed in Euromaidan a year ago.
The NSDC secretary announced that the Security Service of Ukraine together with the Interior Ministry launched the anti-terrorist operation, "in the course of which four participants of the explosion were detained, and weapons, including a grenade launcher, were seized."
"The anti-terrorist operation goes on," he said adding that, according to SBU information, the group that committed the terrorist act was trained in Belgorod, Russia. "This is another evidence that the terrorist campaign conducted in Ukraine has the same commissioners and organizers as the one in the east of our country," the NSDC secretary noted.