The crew members complained of flu-like symptoms after landing at Logan International Airport, Boston's WCVB-TV reported.

US Airways said the crew and 81 passengers, none of whom reported feeling sick, were on a different plane at Reagan National Airport in Washington, when strange fumes were reported.

They were all moved to another plane and flown to Boston.

The crew members were taken to Massachusetts General Hospital where it was discovered that they had elevated carbon monoxide levels.