BAGHDAD — Dozens of Iraqi protesters attacked the Iranian consulate in the Shiite holy city of Karbala on Sunday, scaling the concrete barriers ringing the building, bringing down an Iranian flag and replacing it with the Iraqi flag, eyewitnesses said.

Security forces fired in the air to disperse the protesters who threw stones and burned tires around the building on a street corner in Karbala south of Baghdad. There were no immediate reports of casualties in the incident, which comes amid ongoing protests in the capital Baghdad and majority-Shiite provinces in the south.

They witnesses spoke to The Associated Press on condition of anonymity because of security concerns.

Demonstrators set fire to front of the Iranian consulate in Karbala Iraq on Sunday. Reuters

The protests are directed at a postwar political system and a class of elite leaders that Iraqis accuse of pillaging the country's wealth while the country grows poorer. But protesters have also directed their rage at neighboring Iran and the powerful Iraqi Shiite militias tied to it.

The anti-government protests in Karbala, Baghdad and cities across southern Iraq have often turned violent, with security forces opening fire and protesters torching government buildings and headquarters of Iran-backed militias. More than 250 people have been killed in the security crackdown this month.

The protests have grown and demonstrators are now calling for sweeping changes, not just the government's resignation.

Tens of thousands of protesters have gathered in Baghdad's central Tahrir Square and across southern Iraq in recent days, calling for the overhaul of the political system established after the 2003 U.S.-led invasion. Protesters have also taken over a large tower in the square that was abandoned after it was damaged in the war.

Thousands of students have skipped classes to take part in the street rallies, blaming the political elite for widespread corruption, high unemployment and poor public services.

Iraq's prime minister on Sunday called on anti-government protesters to reopen roads saying "it's time for life to return to normal," after a month of massive rallies demanding wide-ranging political change.

In a statement, Prime Minister Adel Abdul-Mahdi called for markets, factories, schools and universities to reopen after days of protests in the capital and across the mostly Shiite south. He said the threat to oil facilities and the closure of roads had cost the country "billions" of dollars and contributed to price increases that affect everyone.

Earlier Sunday, protesters blocked roads around their main protest site with burning tires and barbed wire, unfurling a banner at one roadblock reading: "Roads closed by order of the people." They appeared to be borrowing a tactic from Lebanon, where similar anti-government demonstrations have been underway since Oct. 17, and have repeatedly blocked major roads in order to ramp up pressure on authorities.

Security forces have fired tear gas, rubber bullets and live ammunition at the protesters, killing at least 256 people in two waves of demonstrations since early October. Since the protests restarted on Oct. 25 after a brief hiatus, there have been near-continuous clashes on two bridges leading to the heavily fortified Green Zone, the headquarters of the government and home to several foreign embassies.

In his statement, Abdul-Mahdi differentiated between peaceful protesters, who he said had turned the demonstrations into "popular festivals" that bring the nation together, and "outlaws" who he said had used the demonstrators as "human shields" while attacking security forces. The prime minister had met with top security officials late Saturday.

The Iraqi High Commission for Human Rights meanwhile said Siba al-Mahdawi, an activist and physician who has taken part in the protests, was abducted on Saturday night by an unknown group. The semi-official body called on the government and the security forces to reveal her whereabouts. Al-Mahdawi was one of several doctors who have volunteered to provide medical aid to the protesters.