The FBI is investigating two separate reports of a person seen flying a jetpack over Los Angeles International Airport (LAX).
The peculiar sighting was reported on Wednesday for the second time in two months.
A China Airlines crew member reported seeing someone flying a jetpack around seven miles northwest of the airport around 1.45pm on Wednesday, the Federal Aviation Administration said.
The FBI is investigating both the incident on Wednesday and another that occurred on 29 August.
"The FBI is in contact with the FAA and is investigating multiple reports of what, according to witnesses, appeared to be an individual in a jetpack near LAX, including one today reported by a China Airlines crew," FBI Los Angeles Field Office spokesperson Laura Eimiller told CNN.