A spokesman for Chalabi's party, Intifad Kanbar, said Monday the attempt Sunday, which Chalabi survived, in the so-called "death triangle" south of Baghdad was planned and carried out by Muslim extremist partisans of the former Iraqi president.
Kanbar projected more attempts against Iraqi officials, noting an investigation already started into the assassination attempt.
He also pointed out a police officer working at the palace of congresses in Baghdad's heavily-guarded "Green Zone" was arrested on suspicion of relaying information to the terrorists on the movement of Iraqi officials and members of the National Assembly.
Chalabi was traveling from Baghdad to the central city of Karbala when his convoy came under heavy automatic fire near the city of Latifiya. One of his bodyguards was killed and three others injured.
Jessica Simpson shares three-way kiss with friends in photo
Dennis Rodman pledges to end trips to North Korea