The sectarian crackup of Iraq seems to be underway. The Sadrite Shi'a forces have taken hold of several mosques. Check out this report from Zeyad:
"The Al-Qudus, Al-Shaheed, and Al-Abrar mosques in Sadr city were evacuated and occupied by the Mahdi army. In the Baladiyyat and Binook districts, the Ahmed Ra’ouf, Al-Qudus, Dhiyouf Al-Rahman, Al-Fayyadh, Al-Muhannad, Al-Hassan bin Ali, and Ibad Allah Al-Muttaqeen mosques have been taken over by armed mobs from Sadr city."
Sunnis are responding by taking to the streets:
"It's almost 3 am and I can still hear gunfire in the neighbourhood. Word of the street in our area is that Sunni neighbourhood watch teams are patrolling several Sunni districts in Baghdad, such as Adhamiya, Ghazaliya, Khadhraa, Adil, Dora, Amiriya, Bayaa, Mansour and Al-Jihad. They say if any Interior ministry forces (read Badr brigade) enter the area, local mosques will shout three Allahu Akbar's through loudspeakers as a sign for residents to defend themselves."
Over 100 mosques have now been attacked.