“The early warning radar system will become operational next week, before the end of this year,” an official said.

"If the requirement is that we drop all reference to violence coming from extreme opposition, that's not going to happen," Churkin said.

The blast caused a part of a building to collapse inside the Frontier Corps camp, which was located in Bannu town.

The previous rally drew tens of thousands and was the largest anti-government protest in Russia for some two decades.