A package mailed to Toyota's plant in Georgetown was flagged as suspicious by the U.S. Postal Service on Thursday. It was the fifth such package mailed to Toyota facilities, including the automaker's North American manufacturing headquarters in Erlanger, over the last week that have been investigated.
It was determined to be non-threatening, said Toyota spokesman Mike Goss.
The FBI announced Wednesday that the packages appear to have come from a Nigerian inventor pitching an idea related to turn signals.
"Local law enforcement and the FBI have been involved in all of these," said Goss, who added the Georgetown package appears to have been from the same person. "So far, no one's found anything threatening in these packages.
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"We're just erring on the side of extreme caution to protect our team members."