SYRACUSE, N.Y. (CBSNewYork) – Talk about your airport mix-ups! A man flying from New York to California was stopped by airport security after he tried to check a bag that accidentally had blocks of inert explosives inside.

The Transportation Security Administration reported on Thursday that the luggage had two blocks of plastic explosives, a knife, and an empty machine gun magazine in it.

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According to TSA Public Affairs spokesperson Lisa Farbstein, the flyer told authorities he grabbed the wrong bag when he left for Syracuse Hancock International Airport.

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“HUGE MISTAKE! Explosives, live or inert, are never allowed on a plane. NEVER,” the TSA spokesperson said in a tweet.

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Syracuse Police told local media outlets that the flyer is from Fort Drum, a U.S. Army military reservation in New York’s Jefferson County.