Queues formed outside many polling stations across Iraqi Kurdistan and voting was extended by on hour until 7.00 pm (1600 GMT) amid complaints over missing voter registrations.

Preliminary counting begun Saturday evening, but final results are not expected for several days, as ballots must be collected in the regional capital Arbil before being transported to Baghdad for the official count.

The entrance into the fray of a new opposition party added interest to the contest during which the regional president was being chosen by popular vote for the first time.

Incumbent Massud Barzani is tipped to retain the post while his Kurdistan Democratic Party (KDP) and Iraqi President Jalal Talabani's Patriotic Union of Kurdistan (PUK) are expected to sweep parliamentary polls.

An enthusiastic cross-section of voters appeared to be backing Nusherwan Mustafa, a wealthy entrepreneur and former PUK deputy leader who is bidding to break the PUK-KDP duopoly, as are a raft of small parties.

Kurds are increasingly concerned about corruption, with many voicing support for change after decades of PUK and KDP dominance.

"This is the first time in my life I feel that I'm actually participating in elections that offer choice and real competition," said Zeez Ahmad Hassan, an engineer from Sulaimaniyah, the region's second city after Arbil.

Hassan, 44, said he would vote for Mustafa, the leader of the opposition Change party, because "Kurdistan badly needs change and renewal."

But Shilan Othman, 36, told AFP that she would cast her ballot for the joint PUK-KDP list, saying its "victory is as clear as the light of the sun in a blue sky."

Security was tight at polling stations across Kurdistan, despite the relative safety of the region compared to the rest of Iraq.

Before the close of voting, a list comprised of four communist and Islamist parties complained of "fraud" and accused the PUK and KDP of bussing unregistered voters to polling stations to cast ballots.

Iraqi Prime Minister Nuri al-Maliki described the election as "another step in building a democratic Iraq" and said they "provide an opportunity to resolve all problems."

Talabani, former deputy prime minister Barham Saleh and Mustafa cast their votes in Sulaimaniyah, while Barzani voted at a summer resort north of the regional capital Arbil.

Kurdistan currently comprises the three provinces of Arbil, Sulaimaniyah and Dohuk.

"We hope that these elections will be a first step to solving issues with Baghdad," Barzani told reporters after voting.

"I will work to get back the disputed areas."

In the run-up to the vote tensions heightened between Barzani and the central government over Kurdish claims to 16 disputed areas along Kurdistan's border with the rest of Iraq.

Barzani insisted during campaigning he will not "compromise" on the Kurds' longstanding claims to the disputed oil-rich city of Kirkuk.

Kurdish peshmerga rebels who had fought the regime of ousted dictator Saddam Hussein are now deployed alongside Iraqi army soldiers, triggering a tense face-off that has raised the prospect of armed conflict.

Disagreements over oil rights have hamstrung exploitation of much of Iraq's massive proven reserves and long-delayed hydrocarbons law, prompting fierce Kurdish criticism.

On June 1, the Kurdish administration began exporting oil for the first time, but Baghdad is contesting the region's right to sign contracts without central government approval.

In Washington on Thursday, Maliki acknowledged that these disputes are among "the most dangerous issues" facing his government, but said he expects to resolve the standoff.

Saturday's vote was held six months after provincial elections took place in the rest of Iraq, except for Kirkuk, where a date for polls has yet to be set.

More than 2.5 million Kurds were eligible to vote.

Five candidates registered for the presidential race, including Barzani, while 24 political lists contested the 111 seats in the assembly which first convened in 1992.