American Airlines temporarily grounded all of its flights in the US this morning due to unspecified technical issues, disrupting travel at the start of a busy Christmas Eve. Service has now resumed as of 8AM ET according to a statement American Airlines spokesperson Sarah Jantz provided to CNN.

The airline hasn’t given any details on what caused the technical issues.

“We’re currently experiencing a technical issue with all American Airlines flights,” American Airlines said in a statement on X before flights resumed. “Your safety is our utmost priority, once this is rectified, we’ll have you safely on your way to your destination.”

Update, December 24th: American Airlines flights have now resumed nationwide.