Russian President Dmitry Medvedev demanded...

"It is difficult to prevent such terrorist attacks and to provide security on transport," the president said. "It is necessary to tighten what we do, to look at the problem on a national scale, not only relating to a certain populated area but on a national scale. Obviously, what we have done before is not enough."

Two blasts in Moscow"s subway stations Lubyanka and Park Kultury occurred during rush hour with an interval of 40 minutes, the first one at approximately 8:00 a.m. According to preliminary information, at least 36 people have died and dozens were injured in the early morning blast.

This is not the first time when a terrorist attack has occurred in transport in Russia. A Moscow-St. Petersburg express train was hit last November, killing 28 people, injuring over 90.

MOSCOW, March 29 (RIA Novosti)