"After demonstrators staged protests demanding the release of political  prisoners, and activists urged sweeping reforms in Saudi Arabia, the  ultra-conservative kingdom appears to have decided to put the lid on  street-based calls for change.   [Updated at 9:25 a.m.: The headline on an earlier version of  this post said demonstrations by Shiites were deemed to contradict Islamic law.  The interior ministry said all demonstrations, not just ones by Shiites, were  contrary to Islamic law.]  On Saturday, Saudi Arabia's interior ministry reportedly issued a statement  deeming all sorts of protests in the kingdom illegal with the explanation that  demonstrations are not in line with Islamic law and values of Saudi society.  "Regulations in the kingdom forbid categorically all sorts of demonstrations,  marches and sit-ins ... as they contradict Islamic Sharia law and the values and  traditions of Saudi society," said a ministry statement published on the  official SPA state news  agency.   It added that Saudi police are "authorized ... to take all measures needed  against those who try to break the law.""