Overview
- A sharp, vomit-like odor surfaced in Hall 25 during Defence Minister Boris Pistorius's speech at Hannover Messe.
- An anonymous post on the Indymedia website claimed butyric acid caused the smell, though the claim remains unverified.
- Police reported a weak, tightly confined odor and said they found no evidence of butyric acid, so they did not open a criminal case.
- Messe staff isolated the spot, replaced a section of carpet, and carried out cleaning and disinfection to curb the smell.
- Reporters on site later said the odor still lingered near the affected area, keeping the exact cause unresolved.