Did Moqtada Al Sadr take part in the actual hanging of Saddam Hussein?

"According to the Saudi daily Al Riyad, citing a witness to the execution of Hussein, one of the masked men was indeed Moqtada Al Sadr. Knowing that Saddam Hussein had Moqtada's father killed, this would not be surprising. In fact the son would want to take part in taking revenge. But if this turns out to be true, this would be another major faux pas for Iraqi authorities.
In fact Moqtada's militia has not only targeted coalition troops but also Sunnis, including mostly civilians. This event could further the gap between Sunnis and Shias around the world especially in Iraq, Lebanon and Saudi Arabia.

Incidentally a famous Saudi ulema (high religious personality) Sheikh Abdelrahman Al Barak just issued a fatwa calling Shias "kuffars" (infidels) and Shiism "the worst religion". He added that Sunnism and Shiism are two irreconcilable religions". In light of rumors of Saudi involvement in helping their Sunni brothers in Iraq, these latest events should be taken quite seriously."
CT Blog

Well from rumor mill to the more serious blog, this story just might have legs.