Facebook announced Friday that it had suspended 82 pages, groups, and accounts that had originated in Iran for engaging in ‘‘coordinated inauthentic behavior’’ and sharing divisive political messages, including opposition to President Trump.

The accounts — some of which were also removed from Facebook’s photo-sharing site, Instagram — do not appear to have clear ‘‘ties to the Iranian government,’’ Facebook said, but the company could not say for certain who was behind them.

More than 1 million Facebook users followed at least one of the pages that the company removed, and tens of thousands of users had joined one of the groups that Iran-based users had created.

One of the most popular accounts, called ‘‘Wake Up America,’’ shared images that criticized Trump, calling him the ‘‘worst, and most hated president.’’ Overall, the page had more than 53,000 ‘‘likes,’’ according to data released by the Atlantic Council’s Digital Forensic Research Lab. Other removed accounts posted about Supreme Court Justice Brett Kavanaugh and issues such as race and immigration. They tended to echo left-leaning positions on political issues.

Nathaniel Gleicher, the head of cybersecurity policy at Facebook, said the company could not ‘‘assess the motivations of these bad actors.’’

Washington Post