Federal security officials in Detroit held an arriving Northwest Airlines flight at the gate on Tuesday while questioning four men regarding alleged "unruly behavior" during the plane's descent. "Four passengers did not comply with crew-member instruction," said a spokeswoman for Delta Air Lines, Northwest's parent company. "Out of caution, the crew requested that authorities meet the plane upon landing." Fellow passengers said the men appeared to be of Middle Eastern descent, and at least one reportedly pulled a blanket over his head prior to landing. Authorities released all four men after questioning, and a spokesman for Detroit Metro Airport said the incident was minor. "If it was serious at all, they would not have allowed the plane to taxi to the terminal," he said.
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