A Boston man is facing charges after authorities at Los Angeles International Airport discovered a host of hazardous and suspicious items inside his luggage, including a smoke grenade, a hatchet, knives, a gas mask, biohazard suits, and body bags, officials said.

Customs officers detained Yongda Huang Harris, 28, on Friday afternoon after he arrived at the airport on a flight from Japan, and they noticed that he was wearing a bulletproof vest and flame retardant pants underneath his trenchcoat, the US Immigration and Customs Enforcement said in a statement.