The Latest: Iraq tightens security after Green Zone breach

The Latest on anti-government protests in Iraq (all times local):

5:00 p.m.

Iraqi forces are tightening security in the capital after anti-government protesters breached the Green Zone and stormed parliament.

The Baghdad Operations Command says all traffic attempting to enter the capital through the city's main checkpoints was halted after the breach on Saturday, and additional police and military units have been deployed to the Green Zone, closing the checkpoints on the compound's outer perimeter and blocking internal roads.

The heavily-guarded Green Zone is home to most of Iraq's ministries and foreign embassies.

Supporters of Shiite cleric Muqtada al-Sadr stormed the Green Zone earlier on Saturday, marking a major escalation after months of demonstrations and sit-ins demanding political reforms to combat corruption and waste.

3:30 p.m.

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.