Sinwar had been credited with being the mastermind behind the Oct. 7, 2023, Hamas attacks, during which over 1,100 people were killed and 250 were taken hostage. It was the deadliest attack against Jewish people since the Holocaust.

The Israeli military has announced the death of Hamas Political Bureau chief Yahya Sinwar in an operation in the Gaza Strip.

Sinwar, 62, served as Hamas’ leader in Gaza since 2017 and was named the group’s overall leader in August after Ismail Haniyeh, the group’s political chief, was killed in Iran—an attack Hamas blamed on Israel, which has not publicly acknowledged any involvement.