ERBIL, Iraq — A drone attack forced a complete shutdown of gas supplies at a natural gas field in northern Iraq, triggering widespread electricity outages across northern regions and prompting urgent condemnation from Iraqi, Kurdish, and U.S. officials.

The strike late on Wednesday, the second in a week, caused a fire at one of the field’s main facilities but resulted in no casualties, according to Iraqi authorities.

Kormor, in Kurdistan region, is one of northern Iraq’s most productive natural gas fields, and its output is used to fuel power plants.

Iraq’s Joint Operations Command said the attack occurred at approximately 11:30 p.m. Wednesday, when an explosive device struck one of the main facilities at the field in Sulaymaniyah province, sparking a fire.

In a statement, the Joint Operations Command described the assault as a “cowardly” and “serious terrorist act” aimed at undermining Iraq’s economic stability and disrupting essential services. Authorities warned the attack could worsen electricity shortages in Erbil and Sulaymaniyah provinces, where the field supplies a significant share of natural gas used for power generation.

“This act constitutes a direct threat to the interests of Iraqis,” the statement said, adding that those responsible would be pursued and face “decisive legal measures.”

In a joint statement, the Kurdistan regional ministries of natural resources and electricity announced that gas supplies to electricity stations were “completely halted” at 11:30 p.m. on Wednesday as a result of the drone attack. On Sunday, local forces intercepted a drone targeting the field.