The Israeli police on Monday arrested a woman on suspicion of sending death threats to the wife and son of Prime Minister Naftali Bennett last month.
Police said the 65-year-old woman was arrested in southern Israel where she lives, but put a gag order on the investigation and the release of any additional details.
Both letters contained live bullets inside the envelopes.
Bennett said at the time that political disagreements, no matter how deep, should notever turn violent. "We must do everything to make sure that does not happen," he said.
"We are all human beings and can have arguments and disagreements but not bullying and threats. I am a prime minister and a politician, but I am also a father and husband and my duty is to protect my wife and children. We must tone the discourse down," he said.
"I call on everyone from all sides of the political spectrum - now is the time for calm and appeasement."
Yoni, in a story posted on Instagram, said the death threats were the result of incitement by right-wing influences who deserve to go to prison.
Bennett has been criticized by members of the Right after he opted to join a coalition made up of parties from the left side of the political spectrum, including the Islamist Ra'am faction.
Members of his Yamina party have also received threats, including his long-time political ally and Interior Minister Ayelet Shaked - who has since been assigned a special security detail.