Authorities in Płock, Poland, responded to a report of unidentified substances discovered in a building on Zielona Street on March 30, 2026, prompting an evacuation.
Report of Suspicious Substances
On March 30, 2026, Płock City Police received a report concerning the discovery of suspicious substances within a building located on Zielona Street.
Police officers dispatched to the scene were met by the reporting woman, a 72-year-old resident, who directed them to a room in the building’s basement. The room contained jars filled with substances of unknown origin, some labeled as potentially hazardous.
Deceased Chemist’s Collection
The woman informed police that the substances belonged to her husband, who had passed away approximately two weeks prior. She stated that he was a chemist by profession and the substances may have been stored for around 20 years.
Safety Measures and Investigation
For safety reasons, the resident was evacuated, and Zielona Street was temporarily closed to traffic. Relevant services are currently on-site.
The discovered substances have been secured and will undergo further analysis. Authorities urge residents to exercise extreme caution and to immediately report any suspicious findings to the appropriate services, advising against any independent handling of unknown substances.
Public Safety Appeal
Authorities emphasize that unknown substances may be toxic or even deadly and should not be touched or handled under any circumstances. Immediate notification of the authorities is crucial in such cases.

