At least four explosive-laden drones attacked oilfields in the semi-autonomous Kurdish region in northern Iraq on Wednesday morning, according to the region's counter-terrorism service.
The three oilfields are in Dohuk province, it said. They are the Tawke and Peshkabir oilfields operated by Norway’s DNO company, and Ain Sifni oilfield operated by US-based Hunt Oil company.
No casualties were reported, but the attacks caused damage, the counter-terrorism service added.
DNO said it had temporarily suspended production at the oilfields. "The damage assessment is under way and the company expects to restart production once the assessment is completed," it said in a statement.
Over the past two days, three other drones have slammed into two oilfields in the region. Two of the drones attacked the Khurmala oilfield on Monday night in the regional capital, Erbil, and another drone struck Sarsang oilfield in Dohuk.
No group has claimed responsibility. The attacks are part of an escalation in a shadowy campaign targeting the Kurdish region's energy infrastructure.
Later on Wednesday, Apikur, a group of eight oil firms operating in Iraqi Kurdistan, said that a majority of its members, including those not targeted, have suspended production.
"The operators are assessing damage to production and other field facilities," Apikur said in a statement, without elaborating on the production cut. According to local officials, the region's total production was around 285,000 barrels per day.
It called on the federal government and Kurdistan authorities to "take additional measures to ensure the safety and security of our staff and facilities".
The regional Natural Resources Ministry said the latest attacks caused "significant damage" and condemned them as acts of "terrorism". Baghdad has promised an investigation.
Politician Khamis Al Khanjar described the bombings as "terrorist attacks that pose a dangerous threat to the country's stability and security".
Mr Al Khanjar blamed "uncontrolled militias that do not want the country to move towards complete political, security, social and economic stability".
He echoed the stance of the Kurdistan Region's authorities, who early this month blamed militias linked to the Popular Mobilisation Forces, a coalition of pro-Iran former paramilitary groups now integrated into Iraq's armed forces. Baghdad has rejected this accusation.
Iran and its proxies in Iraq have long accused Iraqi Kurds of hosting a base in Kurdistan for Israel's Mossad intelligence service. They previously launched several attacks on Erbil, including ballistic missiles fired by Tehran.
Together with opposition groups inside Kurdistan, Baghdad has also accused the region of smuggling crude oil through Iran and Turkey instead of handing it over to the federal government as stipulated in a 2023 ruling issued by the Federal Supreme Court.
Since then, both sides have failed to reach an agreement to hand over all oil industry and oil exports to Baghdad. Tension escalated in late May when Baghdad halted all budget transfers to Kurdistan, including the salaries of public employees, saying the Kurds had already received more than their 12.67 per cent share of the 2025 federal budget, then had failed to deliver their agreed share of oil to the national supply.
The Kurdistan Democratic Party, one of the two major ruling parties in Kurdistan, has threatened to withdraw from the national political process if Baghdad does not release the salaries. Its rival the Patriotic Union of Kurdistan, which is aligned with Baghdad and Iran-backed armed factions and political parties, has rejected this move.
The attacked oil fields are crucial to the region's independent exports. The attacks could be an attempt to stop the flow of crude oil and to pressure Kurdistan amid negotiations to resume exports through Baghdad.
