A man arrested at Los Angeles International Airport wearing a bulletproof vest and flame-resistant pants is not cooperating with federal officials working to discover why he was headed to Boston with a suitcase full of weapons, authorities say.

Yongda Huang Harris, 28, was taken into custody recently during a stopover on a trip from Japan when U.S. Customs and Border Protection officers reported noticing he was wearing the protective gear under his trench coat, triggering a Homeland Security investigation.

Harris has not cooperated with authorities attempting to interview him, according to a U.S. official who spoke on condition of anonymity to discuss an open investigation Tuesday.  The official said Harris, who was taken into custody Friday, is not believed to be linked to a terrorist organization.

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