Facebook has removed 500 pages and accounts allegedly involved in peddling fake news in Central Europe, Ukraine and other Eastern European nations.
The action ends efforts by two separate groups to “manipulate people”, said Facebook in a blog.
The accounts had more than 900,000 followers and between them spent more than $160,000 (£124,000) on adverts.
Facebook said the accounts were loosely connected to Russian state groups known to push fake news.
The shutdowns hit two separate campaigns that were “engaging in co-ordinated inauthentic behaviour”, it said.
The largest group of pages and accounts was located in Russia but targeted its misleading content across most nations and regions in Eastern Europe.