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Russians claim Ukranian forces are dropping booby-trapped chocolate bars on Russian trenches.
(imgur.com)
"Found these in the Zaporizhzhya direction. The enemy is throwing chocolates with an explosive mechanism. Do not open them under any circumstances. Our guy was lucky that it did not detonate, otherwise he could have ended up crippled. I know guys whose fingers were torn off like that."
Yup. I read the convention on mines recently in the wake of the pagers thing. Even if chocolate isn't humanitarian aid, portable booby trapped non-military items are forbidden if they self-trigger. (The pagers actually seem fine by the copy I read, because being remote-controlled makes them "other devices")
Edit: And also specifically food or drink.