Facebook, Google, and Twitter removed hundreds of accounts Tuesday they say are tied to Iranian propaganda, and Facebook also removed a campaign it says was linked to Russia.

Mark Zuckerberg, Facebook CEO, said the social media site took down a campaign linked to sources previously identified as from a Russian military intelligence operation as well as one from Iran connected to its state owned media.

This is the latest of ongoing moves by the social media companies to combat foreign political campaigns on their platforms.

Reuters reports that the Iranian campaign used fake news websites and fake personas across Facebook, Instagram, Twitter, Google Plus and YouTube for propaganda that included anti-Saudi, anti-Israeli, and pro-Palestinian messages and to advocate for policies favorable to Iran.