Israeli officials said Hamas leader Yahya Sinwar was killed by Israel Defense Forces in the southern Gaza Strip on Wednesday. Hamas has not commented publicly on the reports.

Sinwar was the mastermind of the Oct. 7 terror attacks, which killed 1,200 people and set off Israel’s year-long war against Hamas in Gaza. Israel has made killing him a key objective, and may now be more willing to scale back its military operations in Gaza.