In an incident during which an explosive was thrown close to Prime Minister Kishida, who was visiting Wakayama City, after the incident, it was discovered that a number of nuts, which gave the impression to be made from metallic, had been discovered across the scene. Something like a nut can also be hooked up to the cylinder, which is taken into account to be an explosive, and the police are investigating additional, assuming that the suspect tried to extend the ability by scattering the nut throughout the explosion.
Source
Multiple nuts discovered across the website Is the goal to extend energy by scattering with explosion | NHK
