An equipment outage led to a ground stop at Chicago's O'Hare Airport on Saturday, according to the Federal Aviation Administration.

Departures at the airport were grounded at 10:52 a.m. and weren't expected to resume until 12:15 p.m., the agency's website stated. Longer delays were possible, however, with the probability of an extension listed as "medium" at between 30 and 60%.

Details on the outage weren't immediately available.

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