Israeli Prime Minister Naftali Bennett's son received a threatening letter containing a bullet on Thursday, the second death threat sent to the family in the space of 48 hours.
Not long after Israeli police and the Shin Bet security agency began investigating the first death threat made against the prime minister's family on Tuesday, another letter was sent to his eldest son, Yoni, also containing a bullet cartridge.
Sources told Haaretz that the Shin Bet and police have been notified of the new death threat, and are yet to release a statement.
Any further details concerning the investigation into the threat made against the family on Tuesday were placed under a gag order, and police have not released any details concerning the suspects.
A statement released by Bennett said that "After receiving a threatening letter that was intended for the prime minister and his family, security officials at the Prime Minister's Office have decided to increase the security detail protecting the prime minister's family."
On Wednesday, Prime Minister Naftali Bennett addressed growing divisions among Israelis in his Holocaust Remembrance Day speech at Yad Vashem.
"Even during the darkest chapter of Jewish history, during our people's inferno of extermination, the left and the right did not find a way to work together," said Bennett.
"My brothers and sisters, we cannot, we simply cannot allow the same dangerous gene of factionalism dismantle Israel from within."