It was the second time in three days that protesters in Anbar province have flocked into the streets.
The protesters held banners denouncing what they called the "irresponsible practices" of the Shiite-led government against Sunnis and demanded the immediate release of al-Issawi's bodyguards. Other banners mocked that anti-terrorism law they charged applies only to Sunnis, while protesters chanted, "Down, Down al-Maliki."
Ali al-Moussawi, a spokesman for al-Maliki, said the demonstrations were aimed to create nationwide chaos and revive the sectarian conflict in the country.
"Raising the old Iraq flag means that there were people affiliated to the previous regime that cannot live in the new Iraq," al-Moussawi said. "The Iraqi government respects demonstrations and their demands if they are in line with the law, but such demonstrations where the old flag is raised and sectarian slogans are used aim only at creating chaos."
Demonstrators leveled harsh charges against the government.
"The injustice has reached its highest levels," said one demonstrator, who gave only his nickname, Abu Nouri, for security reasons. "Nouri al-Maliki is doing nothing for Iraqis," he said. "He's only busy removing political rivals from his path in the name of democracy and law."
"Why doesn't al-Maliki go after criminals and outlaws among the Shiites who sit in parliament and government, and are well-known for their atrocities over the years?" said another protester, who called himself Abu Omar al-Falluji, using a nickname for security reasons. "The answer is clear. He wants to shut the mouths that criticize him to turn this country into a pure Shiite one affiliated to Iran," he charged.