NEW YORK -- Six LaGuardia airport baggage screeners were decontaminated and part of a terminal was evacuated after a vial of white powder was discovered in a piece of luggage checked by a woman heading to Dallas, authorities said.

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Security Scare At LaGuardia

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Hazmat teams determined the substance in the vial was not harmful, but the screeners were decontaminated as a precaution, according to Heather Rosenker, a spokeswoman for the Transportation Security Administration.

The vial was found during a hand search of the luggage, prompting Port Authority police to rope off part of the terminal near the ticketing counter, as well as a nearby food court.

The woman who checked the bag had boarded the American Airlines flight to Dallas before law enforcement officials could reach her for questioning, Rosenker said. The plane landed at about 1:45 p.m. CST.

The FBI in Dallas did not immediately return a call.