Fake Tip in Holland Shuts Down Baltimore

Blame the Dutch!!

BALTIMORE, Maryland (CNN) -- Information about a possible threat that shut down the Baltimore Harbor Tunnel on Tuesday came from a source in the Netherlands, a senior U.S. official said.

The closures came about as a result of a "threat of undetermined credibility to an unspecified tunnel in the Baltimore area," said Kevin Perkins, head of the FBI's Baltimore office.

According to U.S. officials, the alert was triggered by a report that a shipment of explosives was heading into the city's harbor disguised as cocoa. The explosives then would have been used to build a truck bomb to be detonated inside the targeted tunnel, officials said.

"At this point in time we don't have any evidence that suggests this threat is credible," Perkins said. "However, we are continuing our investigation. We have to follow this to the end."