The Iraqi government insists it has the sole right to develop and market the country's natural resources. Since the 2003 US-led invasion, the Kurds and Arab-led central government in Baghdad have been at loggerheads over rights to develop resources.
Baghdad says only the central government may draw plans, award deals to developers and export crude on the international market, while the Kurds argue that the constitution allows their regional government to do so as well.
Since early January, they started pumping crude oil through a separate pipeline that goes to through Turkey, bypassing a Baghdad-controlled one.
"The shipment of northern Iraqi oil waiting at Ceyhan to international markets has started," Energy Minister Taner Yildiz told Turkey's state-run Anadolu Agency.
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"The loading of one million barrels of oil is continuing," Yoldiz added without naming the buyer.
Baghdad has warned that it will deprive the Kurds of their 17 per cent share in the national budget if they go ahead with the exports without the government's approval and will sue the buyers. Officials in Baghdad were not immediately available to comment.
The country's Shiite Prime Minister, Nouri al-Maliki, emerged the biggest winner, securing 92 seats in the 328-member parliament.
Also today, Iraq's Oil Ministry said crude exports averaged 2.51 million barrels a day in April, a nearly 6 per cent increase from the previous month.