Israel’s military says it has confirmed that Hamas’s military chief Mohammed Deif was killed in an Israeli air strike in the Gaza Strip last month.

Deif was targeted in the strike on a compound in the Khan Younis area on 13 July. Hamas is yet to confirm his death.

Israel says Deif was one of the figures responsible for planning the 7 October attacks in southern Israel in which 1,200 people were killed and 251 taken hostage.

On Wednesday, Hamas political leader Ismael Haniyeh was killed during a visit to Iran. Israel has not commented on his death directly.

The Israeli military said in a statement that “following an intelligence assessment, it can be confirmed that Mohammed Deif was eliminated” in the 13 July strike.

Gaza’s Hamas-run health authorities said at the time of the air strike that it had killed more than 90 people, but denied that Deif was among the dead.

Deif is widely seen as the second-ranking Hamas official in Gaza, behind Yahya Sinwar, the group’s leader in the territory.

Israel’s Defence Minister, Yoav Gallant, said the death of Deif is “a significant milestone” in the dismantling of Hamas.

“This operation reflects the fact that Hamas is disintegrating, and that Hamas terrorists may either surrender or they will be eliminated,” he added.

Mohammed Deif was appointed head of the Izzedine al-Qassam Brigades, the military arm of the Hamas movement, in 2002.

For decades he’s been seen as one of Israel’s most wanted men – and has survived a reported seven assassination attempts, including one that reportedly saw him lose an eye.

He was born in Gaza’s Khan Younis refugee camp in 1965, when the territory was occupied by Egypt.

As a young man in the late 1980s, he joined Hamas shortly after its formation and quickly rose to prominence within the group.

Israel accused him of planning and supervising bus bombings which killed tens of Israelis in 1996, and of involvement in the capture and killing of three Israeli soldiers in the mid-1990s.

Deif is also known to have helped engineer the construction of tunnels that have allowed Hamas fighters to enter Israel from Gaza.

During his leadership of the al-Qassam brigades, he was credited with designing Hamas’s signature weapon, the Qassam rocket.

In 2014, Israel attempted to kill Deif with an air strike on a house in the Sheikh Radwan neighbourhood of Gaza, which killed Deif’s wife, Widad, and their infant son, Ali. Israel thought it had killed Deif, too, but he was not in the building at the time.

Enemies are known to have dubbed Deif ‘the cat with nine lives’, due to the fact he survived so many attempts on his life.

During the current conflict, Deif is believed to have directed Hamas’ military operations from within underground tunnels inside Gaza.

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Israel’s confirmation of Deif’s death comes at the end of a turbulent week in the Israel-Gaza conflict, which has stoked fears of a broader regional war.

On Saturday, 12 Druze children and young people were killed after a rocket fell on a football field in the Israeli-occupied Golan Heights. Israeli Prime Minister Benjamin Netanyahu blamed Lebanon-based Hezbollah, saying they would pay “a heavy price”.

On Tuesday, Israel retorted with air strike on Beirut which killed senior Hezbollah commander Fuad Shukr, as well as four others, including two children.

Hours later, Hamas’s political leader Ismael Haniyeh was killed in a strike on a building he was staying in during a visit to Iran’s capital, Tehran.

Iran has blamed Israel for Haniyeh’s death, threatening “harsh punishment”.