Facebook today released a new set of tools and policy changes intended to fight the spread of misinformation on the platform, moving to more clearly label false posts and content created by state media. Separately, the company removed four networks of accounts based in Iran and Russia that Facebook said misled users about their identities and posted inflammatory political news.

The moves come at a time when Facebook has been pilloried for a decision not to send political ads to fact-checkers. The company stood by that decision today, but acted to label non-advertising content that has been rated false more prominently.

Changes today include: