Hamas on Tuesday named Yahya Sinwar, its top official in Gaza who masterminded the Oct. 7 attacks in Israel, as its new leader in a dramatic sign of the power of the Palestinian militant group's hardline wing after his predecessor was killed in a presumed Israeli strike in Iran. The selection of Sinwar, a secretive figure close to Iran who worked for years to build up Hamas' military strength, was a defiant signal that the group is prepared to keep fighting after 10 months of destruction from Israel's campaign in Gaza.

His selection is likely to provoke Israel, which has put him at the top of its kill list after the Oct. 7 attack, in which militants killed 1,200 people in southern Israel and took about 250 as hostages. Hamas said in a statement it named Sinwar as the new head of its political bureau to replace Ismail Haniyeh, who was killed in Tehran last week in a blast Iran and Hamas blamed on Israel.

Israel has not confirmed or denied responsibility. Also last week, Israel said it had confirmed the death of the head of Hamas’ military wing, Mohammed Deif, in a July airstrike in Gaza. Hamas has not confirmed his death.

In reaction to the appointment, Israeli military spokesman Rear Adm. Daniel Hagari told Saudi-owned Al-Arabiya televsion, “There is only one place for Yahya Sinwar, and it is beside Mohammed Deif and the rest of the October 7th terrorists. That is the only place we’re preparing and intending for him.

” The two assassinations left Sinwar as the most pro.