According to one police commander, around 2:00 p.m., officers from different precincts will be stationed along the demonstration route. They are particularly to be stationed in front of banks and gas stations as well public buildings. These forces are ordered TO AVOID any clash with the demonstrators and only interfere to PREVENT VIOLENCE. Anti-riot forces and Basij units are on alert and will be stationed in alleys and parking areas. The traffic police force will be focused on the major intersection of Roudaki St. and Azadi Blvd. It should be kept in mind that there is a strong possibility that the demonstrators will be attacked and shot at after the demonstration ends. It is absolutely necessary to disperse when the demonstration is done. All the bookstores and other stores in the University of Tehran district (Enghelab Square) are ordered to shut down at 2:00 p.m.
http://behzad-mani.blogfa.com/post-77.aspx
check out the video
http://greenrevolutioniran.blogspot.com/2011/02/blog-post_5452.html
Basij = junkyard dogs.