MOSCOW : A suicide bomber killed two people and injured around 20 outside a police station in Russia’s North Caucasus region of Dagestan, a regional Interior Ministry spokesman said.

Dagestan, which sits on the Caspian Sea, nearly 600 km from Sochi, has become the focal point of violence that rights groups say is fanned by a combination of radicals and anger with corruption and human rights abuses.

The regional Interior Ministry spokesman said six police officers were injured, one of whom was in critical condition. “The car exploded at the gates of the regional police station and, as a result of the explosion, nearby buildings collapsed ... Twenty people have been taken to hospital,” Interfax reported him as saying without identifying him by name.

The national anti-terrorism agency confirmed the bombing and said law enforcement agencies were being sent to the site. It gave no further details.

President Vladimir Putin has made the Sochi games a priority to showcase Russia’s modern face and called on all law enforcement agencies to ensure safety there.