( CNN ) -- Authorities imposed a curfew in the Iraqi city of Ramadi following the arrest of a prominent Sunni lawmaker in a raid that left at least two people dead , police officials said Sunday . The arrest of Ahmed al-Alwani , one of the main organizers of the anti-government demonstrations in the Sunni-dominated Anbar province , has raised fears of a possible retaliatory strike against Iraqi forces . The curfew is in place until further notice , the police officials said . The arrest comes as violence has reached its worst levels since the height of the Iraq War , when sectarian fighting pushed the country to the brink of civil war . Al-Alwani , a staunch critic of the Shiite-dominated government of Nuri al-Maliki , was wanted on a warrant issued by the government alleging the incitement of sectarian strife , said the police officials , speaking on condition of anonymity . Al-Alwani has accused the prime minister of marginalizing Iraq 's Sunni minority . Al-Alwani 's brother and a woman were killed Saturday when Iraqi security forces clashed with the lawmaker 's bodyguards at his Ramadi home , the police officials said . Eleven of al-Alwani 's bodyguards were wounded , they said . Meanwhile , 12 members of Iraq 's security forces were killed in four separate attacks in the Sunni-dominated city of Mosul , north of Baghdad , police officials said . Among those killed were six soldiers who died in a suicide car bombing that targeted a military post , the police officials said . CNN 's Yousuf Basil contributed to this report .
July : A truce has been imposed in Ramadi until further notice , police say . Ahmed al - Alwani , a prominent Sunni leader , is arrested in a raid on his home . He waged a campaign against the Shiite prime minister 's government , calling it sectarian . The government issued an arrest warrant for al - Alwani for allegedly causing sectarian strife .