The (Persian) Gulf Center for Human Rights posted a message on its website on Tuesday deploring the move "as a form of repression that is part of intimidation patterns that are being used persistently in the Kingdom these days", press tv reported.
Attempts inside the country to access the website brought up a notice saying, "Sorry, the requested page is unavailable. "
The rights group, which has offices in Beirut and Copenhagen, said that the blocking comes "at a time when human rights defenders are exposed to various kinds of harassment and arrests, arbitrary imprisonment and unfair trials that lack legal procedures and minimum international standards".
Reporters Without Borders has named Saudi Arabia as one of the "enemies of the Internet" for its censorship and surveillance.
The Al Saud government has come under fire from international human rights organizations for failing to address the rights situation in the monarchy. They say Riyadh has persistently implemented repressive policies that stifle freedom of expression, association, and assembly.