People take part in a protest in Baghdad, Iraq, on Oct. 29, 2019. (Xinhua/Khalil Dawood)

Thousands of Iraqi protesters streamed into streets and public squares in the capital and restive south on Sunday, saying they were not deterred by ­deadly violence meant to "scare" them.

In Baghdad, crowds of anti-government demonstrators thronged Tahrir Square, the epicenter of their movement.

Late Friday, unidentified gunmen attacked a parking complex near Tahrir where demonstrators had been squatting for weeks, leaving 20 protesters and four police officers dead, medics told AFP.

Protesters feared it signalled that their movement would be derailed but by Sunday, the numbers gathered under the sun in Tahrir were staggering.

"They're trying to scare us in whatever ways they can, but we're staying in the streets," said Aisha, a 23-year-old protester. 

At least 452 people - the vast majority of them protesters - have died and 20,000 have been wounded since the rallies erupted. 

In Nasiriyah, a protest hot spot where dozens were killed in a spree of violence last month, protesters regrouped in downtown along with representatives of powerful tribes. 

In other southern cities, ­local authorities had declared Sunday - the first day of the work week in Iraq - a holiday for civil servants. Road blocks and massive strikes also disrupted work in Hilla, Amara, Diwaniya, Kut and the shrine city of Najaf, AFP's correspondents there said.

The rallies have persisted despite the resignation of premier Adel Abdel Mahdi earlier this month, with protesters demanding the complete ousting of the ruling class.