Russia has banned investors from so-called unfriendly countries from selling shares in key energy projects and banks until the end of the year, stepping up pressure in the sanctions standoff with the West.

Western countries and allies, including Japan, have piled financial restrictions on Russia since it sent troops into Ukraine in late February. Moscow retaliated with obstacles for Western businesses and their allies leaving Russia, and in some cases seized their assets.

The decree, signed by President Vladimir Putin and published on Friday, immediately bans investors from countries that supported sanctions on Russia from selling their assets in production sharing agreements (PSA), banks, strategic entities, companies producing energy equipment, as well as in other projects, from oil and gas production to coal and nickel.