A Facebook campaign against the obligatory veiling of women in Iran continued to grow this week, attracting over 15,700 'likes' by Thursday - even as Iran's Cyber Police vowed increased crackdowns on the social network, and after morality police raided and closed Tehran coffee shops for serving improperly-covered women.

Liberal students from Iranian universities launched the Facebook campaign, called 'No to the Mandatory Hijab', two weeks ago.

Since then, thousands of Iranians have 'liked' and commented on the Facebook page, which reads "Rules cannot force anyone to do anything, this includes all people and all women all over the world". The page asks Iranians to send in photographs that are then posted to Facebook with a banner that reads 'Unveil Women's Right to Unveil.'