An FBI spokesman says the man stood up during the flight Monday to make the claim but that there is no indication that any passengers were poisoned. United Airlines says Flight 116 continued as scheduled after the man made the statement.
A passenger from another plane at the terminal says a heavy police contingent greeted the flight's arrival at Newark Liberty Airport.
University of San Francisco student Merrill Amos tells The Associated Press than more than a couple dozen police and emergency vehicles were on the tarmac. She says she saw a staircase pulled up to the plane and an ambulance nearby.
"He wasn't passed-out limp, but he looked very sluggish," Ms Amos said.
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