Police evacuated airport travelers in Terminals 1 and 8 and closed off part of the Belt Parkway Sunday night after receiving several reports that shots were fired.

“All affected terminals will resume operations shortly. No shots were fired,” NYPD said early Monday.

No explanation was given as to what had caused the initial reports.

“There are no injuries,” a Port Authority police statement said. “At this time, no firearm, rounds or shell casings or other evidence of shots fired has been found.”

Both the panic earlier in the evening and the process of clearing the terminals produced dramatic scenes inside the airport and striking imagery on social media, where one user shared pictures and a video that appeared to show hundreds of travelers standing in the terminal with their hands raised over their heads.