Air traffic has resumed at the airport in the Iraqi city of Najaf after protesters withdrew, state television reported late on Friday.
Earlier in the day, hundreds of Iraqis stormed the airport and halted air traffic in the Shia holy city of Najaf, extending protests following demonstrations in the southern city of Basra decrying poor government services and corruption.
No further details were immediately available.
Hundreds of Iraqis stormed the airport and halted air traffic in the Shia holy city of Najaf on Friday, extending protests about poor government services and corruption following demonstrations in the southern city of Basra.
Iraq's top Shia cleric, Grand Ayatollah Ali al-Sistani, expressed solidarity with protesters, saying they faced an "extreme lack of public services" such as electricity in the suffocating summer heat.
"We can only stand with our dear citizens in their demands as we feel their great suffering," Sistani said through an aide during a Friday sermon heard on live television.
Sistani, who has millions of followers, rarely intervenes in politics but has wide sway over public opinion.
Two airport security officials said hundreds of demonstrators entered Najaf airport's main hall and walked on to the tarmac. Witnesses said security forces allowed protesters to enter the main airport building.
Earlier in the day, residents took to the streets of the oil city Basra for a fifth straight day and blocked access to the nearby commodities port of Umm Qasr. Protests were also held in the cities of Amara and Nasiriya as public anger mounted over unemployment and delivery of basic services.
Iraqi politicians face growing unrest as they try to form a coalition government after a May 12 parliamentary election tainted by allegations of fraud.
A political bloc led by cleric Moqtada al-Sadr won a majority in the poll on an anti-corruption platform which had appeal across Iraq's electorate.
In Amara, protesters occupied the headquarters of the provincial governorate, threw stones at branches of the Shia Dawa party and the powerful Badr Organisation, which has close ties to Iran, and beat up policemen, said a security official.
Security forces pushed them back.
A port worker said the road leading into the Umm Qasr terminal near Basra was blocked and trucks had no way of getting in or out. Port officials told employees to go home.
Iraqi Prime Minister Haider al-Abadi held talks with officials in the oil-exporting city of Basra to discuss the unrest.
Protesters hoping to catch his attention stormed the hotel where he was meeting tribal leaders. But he had already left.
The government will quickly address the demands of the protesters, the Council of Ministers said in a statement.
Basra oil officials have said the protests, which have also taken place near major oilfields, have not impacted crude production.
Protesters Threaten More Action
Oil exports from Basra account for more than 95 percent of OPEC producer Iraq's state revenues.
Any potential disruptions to production could severely impact the country's limping economy. Umm Qasr receives Iraq's grain, vegetable oils and sugar shipments.
"We will not stop until our demands are met," said Mohammed Jabbar, 29, an unemployed college graduate.
"If they don't create jobs and improve services such as water and electricity we will close down Basra and oil production."
Iraq's government will be hard-pressed to improve life in Basra, a crumbling city once dubbed the "Venice of the Middle East" for its network of canals resembling the Italian city.
Iraq needs tens of billions of dollars to rebuild after a three-year war with Islamic State.
Long neglected, Basra is one of the few cities in the Middle East without an effective water treatment system. Many of its waterways are stagnant cesspools. State officials blame a public funding crisis caused by years of low oil prices.
People like 34-year-old Nuri Malik, unemployed for ten years, have lost patience.
"Unless our demands are met, we will take steps to escalate. We will stop the activities of oil companies and will not allow them to hire foreigners," Malik said.