A total of 562 KFC outlets remained shut following a weekend of disruption that peaked on Sunday night at 646 closures.

KFC published a list of only 338 of its 900 stores that were still open on Monday night. Many were offering a limited menu and restricted opening hours.

The chicken delivery problem is so severe that the company cannot say when operations will be back to normal. But it said it was working “flat out” to resolve the crisis.

Signs on many of the closed stores said: “Sorry, we’re closed. We deliver our chickens fresh into our restaurants, but we’ve had a few hiccups with the delivery today. We wouldn’t want to be open without offering our full menu, but we’ll be back at the fryers as soon as we can.”

KFC tried to make light of the problem, saying “the colonel is working on it” — a reference to the chain’s U.S. founder, Colonel Sanders, whose image adorns the brand.

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