Mahdi takes over Amarrah?

Just breaking, (Note that they took over the town to settle a dispute with BADR. The Iraqi government was just a bit player that was getting in the way.)

The Shiite militia run by anti-American cleric Muqtada al-Sadr seized total control of the southern Iraqi city of Amarah on Friday in one of the boldest acts of defiance yet by one of the country's powerful, unofficial armies, witnesses and police said......

The Mahdi Army fighters stormed three main police stations Friday morning, planting explosives that flattened the buildings, residents said.

About 800 black-clad militiamen with Kalashnikov rifles and rocket-propelled grenade launchers were patrolling city streets in commandeered police vehicles, eyewitnesses said. Other fighters had set up roadblocks on routes into the city and sound trucks circulated telling residents to stay indoors.

Fighting broke out in Amara on Thursday after the head of police intelligence in the surrounding province, a member of the rival Shiite Badr Brigade militia, was killed by a roadside bomb, prompting his family to kidnap the teenage brother of the local head of the a-Madhi Army.

Reading that last paragraph, I wonder if this was done below the Sadr level. Did the local Mahdi commander do this on his own?