Atlanta ? Airport security officers are used to finding strange critters while screening luggage, they just don’t encounter the kind that have venom too often.

A man flying into Hartsfield-Jackson Atlanta International Airport from South Korea recently packed 30 dead snakes in jars and bottles inside boxes he checked as luggage, said Jon Allen, spokesman for the Transportation Security Administration.

Even though the creatures were lifeless, screeners took extra precautions because U.S. Fish and Wildlife officers warned that some of the snakes could still contain venom, Allen said.