"This misanthropic act testifies that there is no more horrible threat today than terrorism," reads Mironov's statement received by RIA Novosti.
"Yet another terrible crime has been committed. At that time thousands of Muscovites were hurrying to work, and the underground was full of people," the document reads.
"We have to unite and to do everything to stop the wave of bloody terror that today embraces the whole world," it goes on.
Mironov offered his condolences to the relatives of the victims.
The explosion occurred early on Friday near the front sliding doors of the second carriage in a train running from the Avtozavodskaya metro station to Paveletskaya.
According to Russian Deputy Interior Minister Alexander Chekalin, the explosion killed 30 people, the number of the injured is being defined.