Facebook said Wednesday it purged dozens of accounts linked to Russian military intelligence in the latest effort to root out manipulation and disinformation of the huge social network.

Other accounts originating in Iran, Vietnam and Myanmar were also blocked on Facebook and Instagram for "engaging in foreign or government interference," Facebook head of security policy Nathaniel Gleicher said.

The Russia-based network which included 78 Facebook accounts and four on Instagram focused mainly on Ukraine and neighboring countries and posted content about the conflict in Syria, ethnic tensions in Crimea and the downing of a Malaysian airliner in Ukraine in 2014. "Although the people behind this network attempted to conceal their identities and coordination, our investigation found links to Russian military intelligence services," Gleicher said in a blog post.

The move is the latest by social networks seeking to crack down on foreign manipulation including efforts to artificially promote certain political messages, often with misinformation.