Monday's report quotes a statement by the Guard's cyber security division as saying it has tracked "likes" by 8 million Facebook users.

It accuses Facebook of trying to attract users to "immoral pages" with "obscene content" through its suggestion system. It says Facebook openly supports pages that violate the Islamic dress code for women.

The Guard also says authorities detained two Iranian users of who were active in managing porn and creating fake profiles.

Iran occasionally makes these announcements. It banned Facebook and many other social networks following the 2009 disputed presidential election.

Many Iranians have still access to the networks through proxies and VPNs.