Dozens of protesters have climbed over the blast walls surrounding Baghdad's highly-fortified Green Zone and could be seen storming into parliament, carrying Iraqi flags and chanting against the government.

After months of protests, sit-ins and demonstrations outside Baghdad's Green Zone — home to most ministries and foreign embassies — Saturday's escalation marks the first time protesters have breached the compound's walls.

Earlier Saturday, influential Shiite cleric Muqtada al-Sadr accused Iraqi politicians of blocking efforts to implement political reform aimed at combating corruption and waste.

Increasingly tense protests and a series of failed reform measures have paralyzed Iraq's government as the country struggles to fight the Islamic State group and respond to an economic crisis sparked in part by a plunge in global oil prices.