SAN FRANCISCO — Two days after Facebook revealed far-reaching Iranian and Russian disinformation campaigns on its social network, Google said Thursday that it had removed 39 YouTube channels linked to the Iranian state broadcaster.

Google, which owns YouTube, said in a blog post that it had determined the 39 YouTube channels were linked to the Islamic Republic of Iran Broadcasting. It discovered those accounts working off a tip from the cybersecurity firm FireEye about a handful of suspicious Google accounts.

Google terminated those accounts, along with six blogs on its Blogger service and 13 Google+ accounts, for running an influence campaign starting as early as January 2017 while disguising its connection to Iran, said Kent Walker, Google’s senior vice president of global affairs. Google said those accounts had shared “English-language political content in the U.S.,” but it did not provide detail on what types of videos or content.

Google revealed the new influence campaigns taking place through its products after Facebook and Twitter announced that they had deleted similar accounts. It is another indication of the growing efforts by state-sponsored actors to use the social media platforms of American companies for politically motivated purposes.