"We always emphasize that we have a very strong security system that involves... all the country's competent agencies. There has not been a single incident, not even a hint of an incident... As for the terrorist threats, it's not up to me to comment, I don't have such information. I can tell you that the success of the tournament is largely accounted for the high-quality work of the security system," Sorokin said.

The 2018 FIFA World Cup kicked off on June 14 and will continue until July 15, with the matches being played in 11 cities across Russia.

The group stage of the tournament finished on Thursday, and the first Round of 16 games will be held on Saturday.