Israelis are preparing for a response to this week's killings of the political leader of Hamas and the commander of the Lebanese armed group Hezbollah, Israeli analysts told Al Jazeera.

Hezbollah commander Fuad Shukr and Ismail Haniyeh of Hamas, who was a key figure in the Gaza ceasefire negotiations, were killed within hours in Beirut and Tehran. Israel has not commented on the killing of Haniyeh, but has claimed responsibility for the killing of Shukr. Israeli military planners said Shukr was behind a recent attack on the Israeli-occupied Golan Heights that killed 12 children, although Hezbollah denied responsibility

Iran's Supreme Leader Ali Khamenei vowed "severe punishment" for Israel in retaliation for Haniyeh's killing in the Iranian capital. Meanwhile, Hezbollah leader Hassan Nasrallah said the response was "inevitable."

The Israeli army, on the other hand, announced that it is on "high alert", Israeli media reported, and indicated that Israel is trying to put together an international coalition to help repel the attack.

 "There are fewer people on the streets, there is a general sense of anxiety, but nowhere near the hysteria of October when people were convinced that Hezbollah would attack from the north," said Ori Goldberg, a Tel Aviv-based expert on Israeli politics. describing the days after October 7 to Hamas. attack in southern Israel.

The assassinations restored some level of public confidence in Israeli Prime Minister Benjamin Netanyahu and the military after the Oct. 7 attacks, which experts and the Israeli people saw as an intelligence failure, said Israeli pollster and former Netanyahu aide Mitchell Barak.

However, Barak added: "I don't think anyone knows what's going to happen now. "I think everyone is trying to figure out what the answer is going to be or where it's going to come from."