Flights were delayed and canceled in DC after a computer outage grounded planes

At least 200 flights were canceled at airports around Washington, DC on Saturday due to a problem with a flight-tracking system in Virginia, according to the Federal Aviation Administration.

The problem seems to have been resolved, and flights are returning to normal.

Information posted online by the FAA indicated there was a problem with the new En Route Automation Modernization computer system, also known as ERAM, which has been rolled out over the last year and a half at airports across the country.

The FAA attempted to reroute flights around DC airspace, which were instructed to fly at low altitudes.

30% of flights at Washington's Reagan National Airport were canceled, and Baltimore-Washington International Thurgood Marshall Airport canceled 18% of its flights, according to the Washington Post. Dulles International Airport also experienced flight delays and cancellations.

American Airlines said in a tweet that the air traffic control issues impacted all East Coast flights.

The two major airlines flying in out of Washington, DC's airports, American Airlines and United, have been compromised before, reportedly by the same hackers that stole personal information of millions of Americans from the US Office of Personnel Management earlier this year. 

United Airlines claims it detected the breach in late May or early June. But the hackers' digital footprints appear to be well over a year old, dating back to April 2014, according to Bloomberg.

Stranded passengers were tweeting about the inconvenience:

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