DALLAS (AP) — American Airlines flights across the country are grounded because of computer problems.

American asked the Federal Aviation Administration to halt its flights until 5 p.m. EDT. Flights on regional affiliate American Eagle heading to Dallas, Chicago or New York’s LaGuardia Airport have been stopped until 3:30 p.m. EDT.

READ MORE: Chester County DA Taking Over Investigation Into Ellen Greenberg's Death

Some passengers are stuck on planes while others can’t make reservations.

Passengers are using social media to flood the airline with complaints.

READ MORE: Philadelphia Tennis Players React To Serena Williams' Retirement Announcement

American Airlines spokesman Kent Powell said Tuesday that the airline is trying to resolve the issues as quickly as it can.

On Twitter, American is sending out apologies but not offering customers much information about when the problem will be fixed.

MORE NEWS: Phillies Slugger Bryce Harper To Remain As DH When He Returns From Broken Thumb

(© Copyright 2013 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)