The Dallas Love Field Airport was evacuated due to multiple, audible fire alarms, according to an airport manager.
Dallas Fire Rescue determined there was no fire.
As of 11:20 a.m., firefighters said the site was clear and people have been allowed back in the airport. An airport manager said it's believed the alarm system malfunctioned. The system operator is investigating.
About 20 flights were delayed.
According to airport officals, the Transportation Security Agency has made their way back to security and all TSA Security Checkpoints have reopened. Dallas Love Field Airport has not issued a statement regarding the incident, but tweeted updates about the status of the airport regularly.
Southwest Airlines released the following statement regarding the evacuation at Love Field:
"Initial reports indicate that fire alarms sounded at Dallas Love Field and local authorities evacuated the terminal. We will experience some flight delays as we wait for the airport to be assessed and then work to accommodate Customers who are affected by the evacuation. Arriving Customers will also experience delays as a result of the situation. We appreciate passenger patience as we work through the event. Customers traveling to and from Dallas Love Field should consult Southwest.com for the latest information regarding specific flights."
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NBC 5's Meredith Yeomans contributed to this report.