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OKLAHOMA CITY – An unknown odor was reported on a Jet Blue flight coming into Will Rogers World Airport, on Wednesday morning around 2:00 am.

OKCFD were called on site to assist EMSA with patients having trouble breathing. Officials say five people were treated for breathing problems associated with the unknown odor.

The cause of the odor is still being investigated by officials at this time.

Officials say a relief flight arrived at the airport and left with passengers around 11:10 a.m. to land in Ft. Lauderdale.