Security forces at Westover Air Reserve Base in Chicopee, Massachusetts, say they found a small amount of what appeared to be heroin in a commercial vehicle trying to get on the base over the weekend.
The drugs were found in a truck delivering periodicals to the base exchange.
The driver, a New Hampshire man, was turned over to Massachusetts State Police, but there was no immediate word on charges.
A base spokesman says charges are pending based on the investigation.
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Security officials said they have intercepted other drugs and drug paraphernalia before, but this was the first time in memory that heroin was seized at a base checkpoint.