Baghdad Operation Command, which is overseeing a major security sweep by Iraqi and U.S. forces to quell sectarian violence in the capital, warned in a statement that those ignoring the law will have their cars confiscated.
They also face prosecution under antiterrorism laws.
Iraqi Prime Minister Nuri al-Maliki has praised the results of the crackdown in the city, saying hundreds of insurgents have been either killed or captured and that there has been less violence.
(Reuters)