Portland, Oregon (CNN) -- Two F-15 fighter jets escorted a passenger jet that had been headed for Hawaii back to Portland International Airport in Oregon after a passenger in coach became "uncooperative," an airline official said Wednesday. Hawaiian Airlines Flight 39 took off from Portland at 10:10 a.m. with 231 passengers and a crew of 10 when -- 90 minutes into the flight -- its captain decided to turn around the Boeing 767, said Keoni Wagner, the airline's vice president of public affairs. The fighter jets intercepted the plane at 1 p.m., North American Aerospace Defense Command said in a written statement.
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NEW: NORAD says decision made after receiving "indicators" of a problem
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Hawaiian Airlines Flight 39 took off from Portland at 10:10 a.m. with 231 passengers
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90 minutes into the flight, captain decided to turn around the Boeing 767, said airline official
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FBI: Not releasing name of alleged unruly passenger because no charges yet
@placeholder spokesman Wagner said pilots occasionally return a jet to the airport from which it took off.