Kurdish flags were festooned in all the streets, on cars and outside homes across Iraqi Kurdistan.

Voters headed to the polls early on Monday, many men dressed in traditional Kurdish dress of brown shirt and billowing trousers for the occasion.

Young girls wore caps emblazoned with the Kurdish colours of red, white, green and yellow, and regional flags around their necks and shoulders.

“I came very early to be the first to vote for a Kurdish state,” said Diyar Abubakr, 33, outside a polling station in the regional capital Arbil. “It’s a day of celebration today. That’s why I’ve put on our traditional outfit, which I bought for the occasion.”

One voter even brought a cow to slaughter before the start of the vote.

“I brought this cow as today the state is born and it’s tradition to slaughter a cow for a birth,” Dalgash Abdallah, 27, said.

Initial results are expected to be announced 24 hours after polls close. An overwhelming “Yes” outcome is expected, but Kurdish officials have said there are no plans for an immediate declaration of independence.

Barzani, smiling and wearing a traditional outfit, cast his vote early in the morning.

Polling stations are scattered across the three northern provinces of autonomous Iraqi Kurdistan – Arbil, Sulaimaniyah and Dohuk – as well as in disputed bordering zones such as the oil-rich province of Kirkuk.

In Sulaimaniyah, second city of the autonomous region, 40-year-old Diyar Omar came to cast his vote also wearing traditional clothes.

“We will seize our independence through the polls,” he said. “I’m so happy I could take part in this independence vote during my lifetime.”

In disputed Kirkuk, mosque loudspeakers blared a prayer normally reserved for religious celebrations, but participation in the vote was limited.

Those who did take part showed off their ink-stained fingers after casting their vote.

“If I had 20 fingers, I would have voted 20 times for my state,” Ibtissam Mohammed, 45, said.

Kirkuk governor Najm Eddine Karim, who was fired by Baghdad after his provincial council decided to take part in the poll, also voted.

But in Khanaqeen, another disputed territory in Diyala province, Um Ali, 30, said she feared the outcome of the vote and its consequences for her and her children.

“I don’t want separation from Iraq, violence or war,” she said.

Left without a state of their own when the borders of the Middle East were redrawn after first world war, the Kurds see themselves as the world’s largest stateless people.

The non-Arab ethnic group number between 25 and 35 million people spread across Iraq, Iran, Turkey and Syria.

Iraqi Prime Minister Haidar al-Abadi on Sunday pledged to take all the “necessary measures” to protect the country’s unity as his government urged all countries to deal only with it on oil transactions.

Abadi said the Kurds’ unilateral decision to stage a referendum affected both Iraqi and regional security, and was “unconstitutional and against civil peace”.

Iraq’s parliament demanded that troops be sent to the disputed areas controlled by the Kurds.

“Parliament demands that the head of the army (Prime Minister Haider al-Abadi) deploy forces in all of the zones the autonomous region of Kurdistan has taken control of since 2003,” a resolution said.

The Iraqi Kurds export an average 600,000 barrels per day (bpd) through a pipeline running through Turkey to Ceyhan on the Mediterranean.

Barzani said the Kurds’ “partnership with Baghdad” since the fall of dictator Saddam Hussein in a 2003 US-led invasion had failed.

He insisted the vote was “not for defining borders or imposing a fait accompli”.

“We want a dialogue with Baghdad to resolve the problems, and the dialogue can last one or two years,” Barzani said of zones such as Kirkuk.