Iraqis passed through security checkpoints and police cordons to vote Saturday in provincial elections, Associated Press reported. Polls opened shortly after dawn after a step-by-step security clampdown across the country, including traffic bans in central Baghdad and other major cities and closure of border crossings and airports. There were no reports of serious violence as voting got under way. In the Baghdad neighborhood of Karradah, Iraqi police and army soldiers manned a series of checkpoints — some only 200 yards (meters) apart. Stores were closed and the streets cleared of cars. A group of U.S. soldiers patrolled on foot, but well away from polling centers. The U.S. military assisted in security preparations for the elections, but said troops would only be called in on election day if needed. More than 14,000 candidates are running for 440 seats on the influential councils in all of Iraq's provinces except for the autonomous Kurdish region in the north and the province that includes oil-rich Kirkuk, where ethnic groups were unable to reach a power-sharing formula.