SULLIVAN COUNTY, TN -

Monday, Sept 30 UPDATE:

     We're learning more tonight about the suspicious item found on an airplane at Tri-Cities Regional Airport over the weekend putting the airport on lockdown.

     The object was discovered Sunday afternoon on an allegiant flight coming in from Sanford, Florida...by a flight attendant after passengers had left the plane.

     The Bureau of Alcohol, Tobacco, and Firearms won't tell us specifically what it is, but say it's a "commercially manufactured product."

     Airport officials called in surrounding law enforcement, the bomb squad and K-9 units to make sure it was not dangerous.

     Melissa Thomas with the Tri-Cities Regional Airport tells us, "The dogs did not alert so it did not indicate that there were explosives there but they did show some interest. So it's just one of those precautions that we take.  The bomb squad did come in, ATF came in."

     ATF says the item is at the Kingsport Police Department with their bomb squad.

     Kingsport officers believe a passenger left the item behind by accident.

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7:15 p.m. UPDATE: Tom Patton with the Kingsport Police Department says the device that caused a shutdown of the airport turned out to be nothing suspicious. He wouldn't say what the device was, but says a passenger accidentally left it behind.
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UPDATE: We're told the airport is open and all flights have resumed.

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A spokesperson for the Tri Cities Regional Airport confirms a suspicious object was found on a plane arriving from Florida.

It happened around 2:30 Sunday afternoon.

Melissa Thomas with the airport tells us the pilot was on an Allegiant flight from Florida when he discovered something in an overhead bin and called police.

All flights in and out of the airport have been suspended.

We're told security is also shut down.

K9 units are on the scene.

We have a crew on scene and will bring you more information as we get it.