Authorities are investigating multiple witness reports of shots fired inside the Los Angeles International Airport on Sunday night.

Forty-five minutes after the reports sparked panic and prompted mass evacuations, the Los Angeles Police Department said that no shots were fired at the airport and that police will continue to investigate the “loud noises” that caused the security alert.

LAPD responded to multiple 911 calls from three separate terminals inside the airport reporting a shooting at the airport around 9pm local time, NBC News reports.

The Federal Aviation Administration issued a ground stop for all flights departing for LAX until 10pm PT as the situation unfolded.

Lester Holt, an NBC News anchor at the scene, said that security officials yelled “shots fired” as the evacuations took place inside the airport.

Witnesses report shooting at LAX Show all 10 1 /10 Witnesses report shooting at LAX Witnesses report shooting at LAX 1. A police officer stands guard as passengers wait in line at Terminal 7 in Los Angeles International Airport, Sunday, Aug. 28, 2016. Reports of a gunman opening fire that turned out to be false caused panicked evacuations at Los Angeles International Airport on Sunday night, while flights to and from the airport saw major delays. A search through terminals brought no evidence of a gunman or shots fired, Los Angeles police spokesman Andy Neiman said. Ringo HW Chiu/AP Witnesses report shooting at LAX 2. A man with his luggage walks toward Los Angeles International Airport, Sunday, Aug. 28, 2016. Reports of a gunman opening fire that turned out to be false caused panicked evacuations at Los Angeles International Airport on Sunday night, while flights to and from the airport were delayed. A search through terminals brought no evidence of a gunman or shots fired, Los Angeles police spokesman Andy Neiman said. Ringo HW Chiu/AP Witnesses report shooting at LAX 3. A man pulls his luggage and walks toward Los Angeles International Airport, Sunday, Aug. 28, 2016. Reports of a gunman opening fire that turned out to be false caused panicked evacuations at Los Angeles International Airport on Sunday night, while flights to and from the airport were delayed. A search through terminals brought no evidence of a gunman or shots fired, Los Angeles police spokesman Andy Neiman said. Ringo HW Chiu/AP Witnesses report shooting at LAX 4. Traffic congestion is seen near the LAX sign, as terminals at Los Angeles International Airport were evacuated briefly late on Sunday following a false alarm, in Los Angeles, California, U.S., August 28, 2016. Bob Riha Jr/Reuters Witnesses report shooting at LAX 5. Traffic is seen near the LAX sign, as terminals at Los Angeles International Airport were evacuated briefly late on Sunday following a false alarm, in Los Angeles, California, U.S., August 28, 2016. Bob Riha Jr/Reuters Witnesses report shooting at LAX 6. Passengers pull their luggages and walk toward Los Angeles International Airport, Sunday, Aug. 128, 2016. Ringo HW Chiu/AP Witnesses report shooting at LAX 7. Passengers pull their luggages and walk toward Los Angeles International Airport, Sunday, Aug. 128, 2016. Ringo HW Chiu/AP Witnesses report shooting at LAX 8. Airplanes are grounded on the tarmac at Los Angeles International Airport (LAX) late on August 28, 2016 after reports of gunfire in the airport terminal. Part of the busy Los Angeles International Airport was closed due to unconfirmed reports of gunfire, airport officials said on Twitter. Robyn BECK/AFP/Getty Witnesses report shooting at LAX 9. Airplanes are grounded on the tarmac at Los Angeles International Airport (LAX) late on August 28, 2016 after reports of gunfire in the airport terminal. Part of the busy Los Angeles International Airport was closed due to unconfirmed reports of gunfire, airport officials said on Twitter. Robyn BECK/AFP/Getty Witnesses report shooting at LAX 10. Airplanes are grounded on the tarmac at Los Angeles International Airport (LAX) late on August 28, 2016 after reports of gunfire in the airport terminal. Part of the busy Los Angeles International Airport was closed due to unconfirmed reports of gunfire, airport officials said on Twitter. Robyn BECK/AFP/Getty

On social media, passengers were seen running out of the airport, with some running onto a tarmac.