A United plane taxiing on the runway at Denver International Airport returned to its gate Thursday night after a passenger notified a flight attendant of three suspicious passengers on board.
United Flight 593 was met at the gate by Denver police and the Transportation Security Administration, said United Airlines spokesman Charlie Hobart.
The three suspicious passengers and the male passenger who made the report were removed from the plane and questioned, Denver police spokesman Sonny Jackson said.
All four men were eventually cleared and all four men were rebooked on later flights, he said.
No arrests were made.
It's believed that a couple of the passengers were taking photographs, or something like that, while the plane was taxiing, and that raised suspicion, said DIA spokesman Jeff Green.
He said it appeared to be a simple misunderstanding.
During the incident, which occurred around 10 p.m., all passengers were deplaned while the aircraft was swept for suspicious devices, TSA spokeswoman Carrie Harmon said.
Those passengers continued on their flight after a 2½-hour delay. The flight, bound for Santa Ana, Calif., took off again shortly after midnight.
Because of the late hour and timing, the flight had to stop in Los Angeles before it could continue to its intended destination of Santa Ana, Hobart said.
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