Staff in the office of Prime Minister Benjamin Netanyahu discovered a suspicious envelope on Monday.

According to Israeli media reports on Monday, there was no danger to the public, citing a relevant department in the prime minister’s office.

Local Reports have it that the envelope reportedly contained vials with an unknown substance, revealing that the envelope has been sent to a laboratory for examination.

Meanwhile, a government spokeswoman declined to confirm the reports and directed inquiries to Israel Police, which initially did not comment.

Recall that this is not the first of such incident involving suspicious mail at the prime minister’s office.

Security forces most recently examined another envelope in November, which was ultimately deemed harmless.