Ismail Haniyeh was Hamas's most prominent leader until his death in July.

Defense Minister Israel Katz publicly admitted for the first time that Israel is responsible for the death of Hamas leader Ismail Haniyeh, who was killed at the end of July in Tehran. Until now, Israel had avoided commenting on the matter.

Former Hamas leader Ismail Haniyeh was killed in an explosion in a high-security guesthouse in Iran’s capital Tehran in July

Defence Minister Israel Katz on Monday acknowledged that Israel had killed former Hamas chief Ismail Haniyeh in Tehran earlier this year, as he warned the military would "decapitate" the leadership of Yemen's Huthi rebels.

In the months that followed, Israel directly attacked Iran, assassinated Nasrallah and invaded southern Lebanon. In November it agreed to a US-backed ceasefire in Lebanon that enshrined its right to unilaterally enforce any alleged violations by Hezbollah.

The actions of the Israeli military had a "circumstantial influence" on a decision by Hamas militants to kill six hostages in Gaza in August, according to a military investigation published on Tuesday.

Hamas on Monday said the Israel Defense Forces killed or wounded at least 50 people in an air and ground assault on the Nuseirat refugee camp in central Gaza. ABC News’ Ines de La Cuetara reports.