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DENVER -- A scare for passengers on board a Southwest flight heading for Denver before they ever left the ground in Seattle on Thursday afternoon.

There was a bomb threat that apparently involved that flight.

Passengers say someone tried to name a wireless hot spot "Bomb Location Seat 19E." That was enough for federal marshals to halt the flight and arrest the man.

One woman says she was right behind the suspect. "I thought he was in a band because he had a guitar case, so I thought he was going for a gig in boulder or going to college."

The man was arrested without incident.

But passengers waited for several hours on the tarmac as they were re-screened before being allowed to travel to Denver.