The move by Adel Abdul-Mahdi, which came 13 months after he took office, triggered celebrations by anti-government protesters who have been camped out for almost two months in Baghdad's Tahrir Square.
Iraqis have been taking to the streets of Baghdad and the country's Shi'ite-majority south since early October to demand more jobs, an end to endemic corruption, and improved public services.
Abdul-Mahdi, a former finance minister, was picked by rival Shiite Muslim groups as a consensus candidate following parliamentary elections in 2018, but has struggled to form a strong government and start the nation's recovery from a devastating war with Islamic State jihadists.
Abdel-Mahdi, 77, took office just over a year ago.
In response, Prime Minister Adel Abdel Mahdi ordered military chiefs to deploy in several provinces to "impose security and restore order" - but chaos reigned instead. "The real number is much higher", Ali said at a press conference, adding that Adel Abdul Mahdi's government should resign over the failure to meet demonstrators' demands.
"I will submit the official letter to the House of Representatives to step down as head of the present government to let the parliament consider their variants", the prime minister said in a statement.
Friday's announcement came a day after more than 50 people were killed in the capital Baghdad and Iraq's mainly-Shia southern cities of Nasiriya and Najaf.
Grand Ayatollah Ali al-Sistani earlier urged the parliament to consider withdrawing its support for Abdul Mahdi's government to stem spiraling violence.
Sistani also said protesters should distinguish between peaceful demonstrators and those with malign intentions.
In the south of Iraq alone, security forces have killed 36 people and wounded another 245 since Wednesday evening, after protesters burned the consulate of Iran in the holy city of Najaf, security and medical officials told AP. More than 15, ooo people have also been wounded according to the AFP news agency.
Baghdad and the south have been rocked by street unrest, with a protest movement venting fury at the government and its backers in Iran.
Dozens of protesters have been killed and hundreds more injured in clashes with police since popular unrest swept across parts of Iraq's south beginning on October 1, when thousands took to the streets demanding jobs, an end to corruption and what they said was Iran's meddling in Iraq's internal affairs.
Protestors had torched the Iranian consulate the previous night.
The movement has since expanded its demands to include democratic elections and an independent investigation of police conduct. Last week, China's new ambassador to Canada warned Ottawa not to follow the lead of the US and support protesters.
Sky News understands the centres facing the axe are at Houghton-le-Spring near Sunderland, Hull, Leeds, Worcester and Swindon. Its other sites at Oldbury, Birmingham and Solihull are not threatened with closure under the plans.
The loss comes just hours after it was reported that Cowboys head coach Jason Garrett would not be fired during the season. Dallas was so nigh unwatchable that by the end, even the team's owner couldn't stand to watch the final seconds tick away.
Singer-songwriter Jung rose to fame through a reality TV show, while Choi is a former member of boy band FT Island. Both men reportedly "broke into tears as they were escorted back to jail after the sentencing".
That did happen, and you know what, a year went by and I didn't know it". "Everyone gets the same hair". That being said, the Friends star complied but made it very clear that she was not very happy about it.
The Joint Chiefs of Staff of South Korea said that both projectiles flew around 380 km, and reached an altitude of around 97 km. In Washington, a State Department official said the USA was monitoring the situation and consulting with allies in the region.
Who's compared to another player someplace else? Heck, they'd probably love to see him coaching a division rival into the 2020s. The Cowboys need to win the Super Bowl for Garrett to earn a contract extension, sources told Mike Freeman of Bleacher Report .
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