https://www.reuters.com/article/us-facebook-propaganda/facebook-says-likely-russian-based-operation-funded-u-s-ads-with-political-message-idUSKCN1BH2VX

Facebook Inc said on Wednesday it had found that an operation likely based in Russia spent $100,000 on thousands of U.S. ads promoting divisive social and political messages in a two-year-period through May.