The Federal Aviation Administration says that a ground stop has been issued for Delta flights at Detroit Metro Airport Friday morning, citing a network outage affecting operations.

It was a nightmare travel day for people flying in and out of the McNamara Terminal at Detroit Metropolitan Wayne County Airport (DTW), as a ground stop on all flights lasted for hours.

"Due to a technical connectivity issue in Detroit, Delta has issued a ground stop for all flights at DTW airport this morning," the company said in a statement.