Krispy Kreme doughnut deliveries have been disrupted by a cyberattack, the corporation says.

Krispy Kreme stores are open for in-person orders, but the corporation is “experiencing sure operational disruptions, including with online ordering in parts of the United States,” it says in a update filed Wednesday with the stocks and bonds and trade percentage.

In the update, Krispy Kreme said it learned about “unauthorized activity on a portion of its information technology systems” on Nov. 29. The corporation “immediately began taking steps to investigate, contain, and remediate the incident with the assistance of leading cybersecurity experts,” the corporation said in the update.

Online ordering and delivery of doughnuts is unavailable in some areas, but “daily fresh deliveries to our retail and restaurant partners are uninterrupted,” Krispy Kreme said in the update. Krispy Kreme began offering doughnuts in some McDonald’s locations earlier this year.

Customers hankering for Krispy Kreme doughnuts can got to the corporation website to discover a nearby grocery or convenience store that receives deliveries.

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“The corporation, along with its external cybersecurity experts, continues to work diligently to respond to and mitigate the impact from the incident, including the restoration of online ordering, and has notified federal law enforcement.”

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The investigation of the breach continues and the corporation doesn’t yet recognize the packed impact of the incident. But, the incident will likely have “a material impact on the corporation’s business operations until recovery efforts are completed,” Krispy Kreme said. However, the incident isn’t expected to have “a long-term material impact” on operations and finances, the corporation said.

Expected costs include lost profits from online sales, costs for cybersecurity experts and any structure restoration costs. Cybersecurity insurance “is expected to offset a portion of the costs of the incident,” the corporation said.

Shares of the corporation were down about 2% Wednesday and are down 33% so far this year.

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