A Frontier Airlines passenger made a bomb threat aboard Flight 2539 at Hartsfield-Jackson Atlanta International Airport on Sunday, triggering a law enforcement response and investigation.

The incident occurred after the flight had landed at the Atlanta airport. According to pilot communications, the passenger was seated and began making threatening statements toward another passenger seated next to him.

"He's in his seat. He is starting to threaten to kill the lady who's sitting next to him, and he is saying that he has a bomb on board," the pilot reported during the incident.

Law enforcement authorities responded to the aircraft following the bomb threat. The plane underwent security procedures as officials investigated the passenger's claims.

After investigation, authorities determined the bomb threat was not credible. The incident remains under investigation by law enforcement officials.

Frontier Airlines has not released additional details about the specific circumstances surrounding the threat or the passenger involved in the incident.