Cyber activists have created a group on Facebook calling for a "Day of Anger" on Friday in the eastern Saudi region, following the arrest of a Muslim cleric

Cyber activists have created a group on Facebook calling for a "Day of Anger" on Friday in the eastern Saudi region, following the arrest of a Muslim cleric.
  
The group of more than 500 members is calling for protests after Friday prayers in Al-Hufuf, in Eastern Province's Al-Ihsaa governorate, to demand the release of Sheikh Tawfiq al-Amer.
  
Amer was arrested after calling for a "constitutional monarchy" in the kingdom, according to the Rasid website. It said that Amer has been held several times in the ultra-conservative absolute monarchy over his calls "for giving Shiites further freedom to exercise their religious rights."