Russia complained to Facebook and Google that the ads they spread "interfered" with the country's elections.
These ads are seen on social media and on the web, and Russia is conducting local elections this weekend.
Russia's national communications regulator Roskomnadzor said that technology giants Google and Facebook allowed political advertising in Sunday's regional elections, despite being asked to ban such propaganda.
Roskomnadzor said this type of action could be seen as interfering with Russia’s sovereignty and hindering the democratic elections in the Russian Federation.