Advertising and public-relations agencies have been banned for working for Russian oil and gas firms as part of a new wave of sanctions designed to increase pressure on the Putin regime.

The latest round of sanctions following Russian President Vladimir Putin’s invasion of Ukraine includes a ban on the export of services, including engineering and accounting, to Russia’s oil, gas and chemical industry.

The new sanctions outlaw 28 types of Canadian consultants, including technical and management consultants and advertising agencies, from working for Russia’s oil, gas and chemical sector, which accounts for about 50 percent of the country’s revenues.