Update 11:06 p.m. EDT Sept. 25: Delta Airlines has fixed it's computer system after an outage Tuesday caused a nationwide groundstop.

Delta officials said operations were returning to normal and that it was working to rebook passengers whose flights were disrupted.

“We apologize to all customers for this inconvenience,” the company said in a written statement.

The ground stop did not affect flights in the air.

Original story:Atlanta-based Delta Airlines is experiencing an online outage, according to the company's Twitter account.

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Delta officials said the airline is having technical difficulties with its computer systems and that repairs are underway.

A ground stop is underway and airline officials said it may be another hour before the problem is fixed.

Passengers wrote on Twitter they are experiencing delays, can't buy tickets on their website or check flight status, and many are stuck on tarmacs across the country.

Delta released the following statement:

"Delta IT teams are working diligently to address a technology issue impacting some of our systems. We have issued a Delta groundstop as we work to bring systems back up as quickly as possible. We apologize to all customers for this inconvenience."