A passenger on a JetBlue flight opened an emergency exit door and deployed the slide while the plane was taxiing at Logan Airport in Boston Tuesday night, the FAA said. Witnesses said the man was arguing with his girlfriend before he opened the door at about 7:30 p.

The passenger on the JetBlue flight opened an exit “for unknown reasons” while the airplane was taxiing, or moving on the runway.

An investigation is underway after two people were found dead in a JetBlue plane's landing gear area at the Fort Lauderdale-Hollywood International Airport.