FBI letter tells Alaska Airlines passengers they are 'a possible victim of a crime'

A photo from the National Transportation Safety Board shows seats that were near the door plug expelled from a Boeing 737 Max 9 in flight. Seats 26A and 26B were unoccupied — a fact that helped prevent the incident from being worse, officials said. (NTSB)

People who were aboard a Boeing 737 Max 9 jet whose door plug was explosively expelled after departing an airport in Portland, Ore., in January are being contacted by the FBI about a criminal investigation.

"I'm contacting you because we have identified you as a possible victim of a crime," the letter from a victim specialist with the FBI's Seattle Division begins.