The increase is in addition to 14,000 American soldiers sent into the region since May.
Protesters attempted to dismantle barricades preventing them from crossing the bridge leading to the heavily fortified Green Zone, where most government buildings and foreign embassies are based.
The anti-government demonstrations began on October 1.
Protesters ran away as live ammunition, tear gas canisters and stun grenades were fired towards them.
Iraqi security forces fired tear gas and live rounds into the air to disperse protesters in central Baghdad on Wednesday (November 6) as the biggest wave of anti-government demonstrations in decades spread out across the capital.
Anti-government protests in Iraq continued over the weekend with medical sources claiming one person was killed and over 90 injured
The crowd consisted mostly of young men, many draped in Iraqi flags. Surrounding streets brimmed with cars, taxis, motorcycles and tuk-tuks as more people made their way in.
Protestors returned to the streets of Iraq over the weekend
The Iraqi parliament will meet in an emergency session to address the demands.
Police and medical reports suggest the number of people killed in recent days during protests against corruption and unemployment is at least 81.
The Iraqi High Commission For Human Rights revealed that the death toll increased to 73 and 3,000 more people have been injured since Tuesday when protests began.
After the zone was officially opened to the public in June, drivers' journeys have been shortened from a couple of hours to under ten minutes.
With economic malaise, domestic and regional political tensions plus a lack of government jobs, the start-up movement is gaining momentum in the Iraqi capital of Baghdad.
With 95% of votes counted, Moqtadr al-Sadr in pole position to choose next prime minister
Analysts say the election will shape attempts to heal the country’s deep divisions and could shift the regional balance of power.
Suicide bombers reportedly killed dozens of people and injured over 100 in a busy market in the Iraqi capital.
Four women including a 16-year old girl, captured in the Iraqi city of Mosul have been confirmed as German nationals
A male model has been found murdered in the streets of Baghdad.
Karar Nushi, who was known for his flamboyant style and flowing blonde locks, was
So-called Islamic State says it was behind a car bomb attack outside a packed ice-cream parlour in Baghdad early on Tuesday that has reportedly left
Ali al-Moussawi is a bookworm from Baghdad in Iraq who has turned his love of reading into a career.
A car bomb has killed at least 48 people and wounded dozens more in Baghdad.
A suicide bomber detonated a pick-up truck in Sadr City, a heavily-populated and poor Shi'ite suburb of Baghdad.
Suicide car bomb kills and maims in Sadr City
Blast comes as the French President Francois Hollande visits the Iraqi capital
Dozens of people have been killed in Iraq following multiple attacks in Baghdad and across the country.
A car bomb explosion near a hospital in central Baghdad has left at least nine people dead.