Maybe a dumb question, but why would this warrant an evacuation? I get that it’s contraband, but it’s drugs, not a weapon. Unless they thought since one disallowed thing made it’s way in that there could be other stuff (weapons) as well?

Edit: or maybe they thought it could be anthrax at first, which makes much more sense as to why they would evacuate

This and the post link appear broken for me. The source url works (but is paywalled) though: https://www.ft.com/content/8c247cb9-c14b-4fd6-94d6-300655c35c1e

Edit: Looks like archive.is is down at the time of writing