Meanwhile, alleged faults in the electoral process have prompted Iraqi Prime Minister Haidar al-Abadi to call for a probe into the complaints about irregularities in the parliamentary elections.
With parliament having one month before it expires, it remains uncertain whether the vote recount can be done.
There have been complaints about irregularities at some polling stations linked to a new electronic voting system in Iraq.
Iraq's parliamentary elections were held on May 12.
Sadr's Sairoon bloc won 54 out of 329 seats in the Iraqi parliament. The Fatah (Conquest) Alliance, led by Secretary General of Badr Organization Hadi al-Ameri, and Abadi's Nasr (Victory) Coalition finished second and third with 47 and 42 seats, respectively.
Negotiations are underway between Iraqi parties to form the new government.
Over 7,000 candidates contested the 329 seats in the parliament that will choose a new president, prime minister and government in Iraq.
