MOSCOW, April 22. /TASS/. Three more Russian regions request introducing a ban on mining, the press service of the Energy Ministry told TASS.

"Three regions are referred to, Karelia (its northern part), the Penza Region and Khakassia (a number of districts," the ministry said.

The Energy Ministry does not have information thus far whether the ban is a complete one or is introduced for the heating season, from November 15 to March 15.