A terr0rist attack was prevented in the Kursk region

Two improvised explosive devices, a traumatic weapon with cartridges and Nazi literature were confiscated from a resident of the region, who was preparing a terrorist attack in agreement with the Ukrainian special services, the FSB reported.

I also found this written somewhere else:
A terrorist was caught in Kursk, who acted on the orders of the Ukrainian special services.

The Russian detained by the FSB received instructions to monitor the movement of military equipment and military units in the region.

"An instruction has been received to make a series of explosions to destabilize the situation and stoke panic among the population," he said.

Improvised explosive devices and Nazi symbols were found in the detainee's possession. Until 2015, he was a citizen of Ukraine.