The latest status in Tehran (Based on Twitter feeds)

20:15 Tehran local time:

Tehran Laleh Park and Shiroudi Stadium have become the command center to organize anti-riot police and plain clothes.

There is a massive, massive, massive police presence - their presence is really intimidating

British embassy in Tehran is evacuating the families of staff members

18:30 Tehran local time:

Thousands are now in 7 Tir sq. clashes after tear gas fired

Theres Anti-riot police with guns in their hands from roof tops in 7th tir sq

Amirabad, Tehran is currently full of guards and police

 RT Riot police R attacking hundreds of protesters w/ tear gas, & firing live bullets in the air

Helicopters hovered overhead as abt 200 protesters gathered at Haft-e-Tir Square, 100's of riot polices