Followers of Iraqi Shiite cleric rally in central Baghdad

Followers of Iraq's influential Shiite cleric Muqtada al-Sadr wave national flags as they gather in front of the heavily guarded Green Zone, ahead of a scheduled parliament session to press for a vote on a new government, in Baghdad, Iraq, Tuesday, April 26, 2016. Thousands of Muqtada al-Sadr's supporters arrived there early on Tuesday to join others who have been holding a sit-in since two weeks ago, snarling traffic in huge parts of the Iraqi capital. Many protesters are waiving Iraqi flags and playing songs praising al-Sadr. (AP Photo/Karim Kadim) (The Associated Press)

Followers of Iraq's influential Shiite cleric Muqtada al-Sadr gather ahead of a scheduled parliament session to press for a vote on a new government, at Tahrir Square in Baghdad, Iraq, Tuesday, April 26, 2016. Thousands of Muqtada al-Sadr's supporters arrived there early on Tuesday to join others who have been holding a sit-in since two weeks ago, snarling traffic in huge parts of the Iraqi capital. Many protesters are waiving Iraqi flags and playing songs praising al-Sadr. (AP Photo/Karim Kadim) (The Associated Press)

Followers of Iraq's influential Shiite cleric Muqtada al-Sadr wave national flags as they gather in front of the heavily guarded Green Zone, ahead of a scheduled parliament session to press for a vote on a new government, in Baghdad, Iraq, Tuesday, April 26, 2016. Thousands of Muqtada al-Sadr's supporters arrived there early on Tuesday to join others who have been holding a sit-in since two weeks ago, snarling traffic in huge parts of the Iraqi capital. Many protesters are waiving Iraqi flags and playing songs praising al-Sadr. (AP Photo/Karim Kadim) (The Associated Press)

Followers of an influential Shiite cleric have flocked to central Baghdad ahead of a scheduled parliament session to press for a vote on a new government.

Security forces blocked off all the roads leading to downtown Tahrir Square with razor wire and concrete blocks.

Thousands of Muqtada al-Sadr's supporters arrived there early on Tuesday to join others who have been holding a sit-in since two weeks ago, snarling traffic in huge parts of the Iraqi capital. Many protesters are waiving Iraqi flags and playing songs praising al-Sadr.

Prime Minister, Haider al-Abadi, has offered a new Cabinet but political blocs have rejected the nominees. A delay in the vote on a second list has also spurred a sit-in by lawmakers inside parliament, demanding top political leadership step down, including al-Abadi.