Israeli police dispatched bomb disposal experts and forensic teams to Prime Minister Benjamin Netanyahu's office in Jerusalem on Monday, after a suspicious envelope containing unidentified ampoules was discovered.
The envelope was sent to a biological laboratory in Nes Ziona for further examination to determine the nature of the substance inside, according to Israeli media reports.
A senior source familiar with the details told Maariv newspaper that ampoules of unknown origin and content were found inside the envelope.
The Prime Minister's Office Security and Emergency Division said in a statement that "an envelope with suspicious signs was received and identified during inspection. It was handled according to protocol. The handling has been completed. There was no danger to any of the employees."
Israel Police immediately dispatched a mobile forensics laboratory with investigators and a bomb disposal unit to the scene upon receiving the report.
After bomb disposal experts determined there was no explosive material, they collected the envelope and sent it to the biological laboratory for further analysis.
Police vehicles were observed outside Netanyahu's office during the incident.
This marks the third time in recent months that a suspicious envelope has been sent to the Prime Minister's office.
In November 2025, a suspicious envelope was found at the office, prompting the dispatch of bomb experts and paramedics. It was later determined that the envelope did not contain hazardous material.
In April 2025, another suspicious envelope was discovered at the Prime Minister's office. That envelope was also confirmed not to contain hazardous material.
Separately, a large-scale emergency drill is scheduled for Monday in the northern city of Caesarea, where Netanyahu's residence is located.
Police, Israel Defense Forces, fire services and Magen David Adom emergency medical teams will participate in the exercise.
Authorities said the drill will involve heavy movement of security forces, emergency vehicles, helicopters and unmanned aerial vehicles in the area.