(CNN) -- State-run Iraqiya TV announced Monday that Iraq's parliament has been postponed for at least a month, a day before lawmakers were scheduled to return to form a new government and begin selecting a prime minister. Citing parliament sources, Iraqiya reported that the session was postponed until August 12 because political parties have been unable to reach a consensus on who to name to the country's top leadership posts. Those include the speaker, the president and the prime minister.