What has happened confirms this, he said in interview with RIA Novosti.
According to Ozerov, no troubles in the work of the Moscow metro could lead to such a powerful explosion. "Metro does not work on gasoline, and even a short circuit could not cause such an explosion and such a fire," the senator said.
"That is why we can speak only about the terrorist act," he pointed out.
At the same time the senator believes that no special security measures can be introduced in the Moscow metro. "We cannot place a metal finder at each station," he believes.
According to Ozerov, "those who are trying to put things in order there" should be responsible for the explosion."