Iraqi officials have raised Friday's death toll to at least 20 after a bloody night of attacks by unidentified gunmen that targeted anti-government demonstrators near the main protest camp in Baghdad.

More than 130 others were wounded by gunfire and stabbings near Tahrir Square, the main protest camp in the Iraqi capital, the Associated Press news agency reported, citing health and security officials who spoke on condition of anonymity.

It was the most violent flare-up in the capital for weeks and came a week after parliament accepted Adel Abdul Mahdi's resignation following two months of huge protests demanding his departure and the overhaul of the country's political system.

Al Jazeera's Dorsa Jabbari reports from Baghdad.

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