Published: Nov 01, 2010 3:55 PM EDT
Updated: Nov 01, 2010 12:55 PM EDT

JACKSONVILLE, Fla. (AP) - A Southwest Airlines flight to Jacksonville was delayed after a flight attendant spotted white powder leaking from a box in an overhead bin.

Officials say the substance turned out to be a harmless foot powder.

Passengers aboard Flight 602 departing from Birmingham, Ala., were taken off the plane Sunday evening. A hazardous materials team went on board to investigate.

Testing determined the substance was not dangerous, and the 77 passengers were allowed back on the plane and departed safely to Florida.

A Southwest spokesman said a passenger thought the substance was foot powder he had packed. Authorities confirmed that was the case.