A staffer at John K. King Used and Rare Books discovered a box containing bottles, one of which held picric acid, a type of explosive acid. This finding led to a significant response, with hazmat crews arriving to retrieve the item.

The bookstore, which houses an estimated one million old books, was the site of the discovery. The presence of the hazardous substance prompted crews to close down the surrounding street.

Further details about the incident are available from the source, including the circumstances surrounding the discovery and the response of the hazmat crews.