Postal workers at a sorting facility in Peschiera town of Borromeo, near Milan in Italy found three pistol bullets in a letter sent to Pope Francis.
The Police have launched an investigation into the envelope addressed with pen.
The letter addressed to “The Pope, Vatican City, St. Peter’s Square, Rome”, is believed to have been sent from France.
In a statement, David Dadge, Universal Postal Union (UPU) Communication Manager, commended the workers who discovered the ammunition.
Dadge said the discovery shows that mail persons are not just deliverers of mail, “they are on the frontline when trying to keep the public safe”.
The spokesman noted that postal workers, who process billions of letter and parcels annually, risk handling bullets, bombs and deadly drugs.
During the COVID-19 pandemic, Dadge added, brave employees worldwide continued to keep the mail moving to benefit societies and economies.
The Police are expected to provide an update on the probe after analyzing the bullets and handwriting.