U.S. carrier Alaska Airlines said late on Thursday it was restoring its operations after a technology outage earlier in the evening had grounded its flights at all airports.

The ground stop also applied to Alaska Airlines’ subsidiary Horizon Air, a Federal Aviation Administration advisory showed. The ground stop was requested for a period of almost three hours.

“We are still experiencing an IT outage affecting our operations that has resulted in cancellations of some of our flights this evening and into tomorrow,” the airline said in the latest post on X.

Alaska Airlines earlier said it was experiencing an IT outage affecting its operations, with a temporary ground stop being in place.

The airline added that it was actively working towards restoring its operations following the outage.

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