The announcement was made at a televised news conference at which the MPs also demanded "the withdrawal of the army... and the release of MP Ahmed al-Alwani," a Sunni who was arrested during a deadly raid on Saturday.
Clashes broke out today in the Ramadi area, west of Baghdad, as security forces dismantled a protest camp where demonstrators had gathered for more than a year.
Ten militants died in the fighting, which also spread to the nearby city of Fallujah.
The demonstrations have tapped into longstanding grievances of Sunnis, who say they are marginalised by the government and unfairly targeted with heavy-handed tactics by security forces.