UPDATE 2:25 PM: American Airlines says it has resolved technical issues.

WASHINGTON — (CNN) American Airlines flights were grounded Thursday at three of its busiest airports by technical problems.

The problem affected Chicago’s O’Hare Airport, as well as Dallas-Fort Worth and Miami.

“We’re working to resolve technical issues impacting several airports as quickly as possible,” an American spokesman told CNN. “We apologize to our customers for the inconvenience.”

–CNN’s Rene Marsh contributed to this report.

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