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The Independent UK
The Independent UK
National
The Associated Press

Who is Hamas leader Yahya Sinwar?

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Israel says it is looking into the possibility that Hamas leader Yahya Sinwar, a mastermind of the Oct. 7, 2023, attack that triggered the war in Gaza, has been killed in a military operation.

His death, which has not yet been confirmed, would be a significant moment in Israel's yearlong offensive against the militant group and could complicate efforts to release dozens of hostages held in Gaza.

Sinwar became the head of Hamas after the killing of the previous leader, Ismail Haniyeh, in an explosion in Iran in July that was widely blamed on Israel.

Some things to know about Sinwar:

From refugee camp to Hamas militant

Sinwar was born in 1962 in a refugee camp in the Gaza town of Khan Younis. He was an early member of Hamas, which was formed in 1987. He eventually led the group's security arm, which worked to purge it of informants for Israel.

Israel arrested him in the late 1980s and he admitted to killing 12 suspected collaborators, a role that earned him the nickname “The Butcher of Khan Younis.” He was sentenced to four life terms for offenses that included the killing of two Israeli soldiers.

A prison leader

Sinwar organized strikes in prison to improve working conditions. He also studied Hebrew and Israeli society.

He survived brain cancer in 2008 after being treated by Israeli doctors.

Sinwar was among more than 1,000 Palestinian prisoners released in 2011 by Prime Minister Benjamin Netanyahu as part of an exchange for an Israeli soldier captured by Hamas in a cross-border raid.

Rise to Gaza power

When Sinwar returned to Gaza, he quickly rose through Hamas' leadership ranks with a reputation for ruthlessness. He is widely believed to be behind the 2016 killing of another top Hamas commander, Mahmoud Ishtewi, in an internal power struggle.

Sinwar became head of Hamas in Gaza, effectively putting him in control of the territory, and worked with Haniyeh to align the group with Iran and its proxies around the region while also building the group's military capabilities.

The October attack on Israel

Sinwar, along with Mohammed Deif, the head of Hamas' armed wing, is believed to have engineered the surprise Oct. 7 attack on Israel.

The attack killed about 1,200 Israelis, mostly civilians, and sparked a war that has killed over 42,000 Palestinians in Gaza, according to health authorities there.

Hamas said it launched the attack in retaliation for Israel's treatment of Palestinians and to push the Palestinian cause back onto the world agenda.

Israel said it killed Deif in a strike in July, while Hamas says he is still alive.

Where would this leave Hamas?

Sinwar has been in hiding since the attack, and cease-fire negotiators have said it can take several days to send and receive messages from him.

Even before becoming Hamas' top leader, Sinwar was believed to have the final word on any deal to release hostages held by the militant group. Some 100 hostages remain in Gaza, around a third of whom are believed to be dead.

It's unclear who would replace Sinwar, and what that might mean for the cease-fire efforts, which sputtered to a halt in August after months of negotiations brokered by the United States, Egypt and Qatar.

Hamas has hundreds of thousands of supporters in Gaza, the Israeli-occupied West Bank and Palestinian refugee camps across the region. Several of its top leaders are based in Qatar, which has served as a mediator between Israel and the militant group.

Israel has arrested and killed several top Hamas leaders and militant commanders over the years, and the militant group has quickly replaced them. But it has never fought a prolonged war against Israel, which says it has killed dozens of high-ranking militants and over 17,000 fighters, though it has not provided evidence for the latter figure.

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