The Palestinian militant group Hamas says it has chosen Yahya Sinwar, its top official in Gaza who masterminded the Oct. 7 attacks in Israel, as its new leader. The choice of Sinwar, a secretive figure who leads Hamas' hardliners and is close to Iran, was a defiant step. Sinwar is at the top of Israel's kill list as it seeks to destroy Hamas and its leadership after the Oct. 7 attack. He replaces Ismail Haniyeh, who was killed in Iran last week in a presumed Israeli strike. Unlike Haniyeh, who had lived in exile in Qatar for years, Sinwar has remained in Gaza.

The Israeli military says it has confirmed that the head of Hamas' military wing was killed in an airstrike in Gaza in July. The announcement about Mohammed Deif comes a day after the assassination of Hamas' political chief in an airstrike in Iran. The killings have left U.S., Qatari and Egyptian mediators scrambling to salvage talks for a cease-fire deal in Gaza, even as international officials try to avert an all-out regional war. Hamas had no immediate comment on Israel's announcement of Deif's death. The militant group had previously said he survived the airstrike.

Hezbollah's leader warned that the militant group's conflict with Israel has entered a "new phase." He made the comments Thursday following the killing of a top Hezbollah commander in Beirut and Hamas' political chief in Tehran. Hassan Nasrallah spoke to a funeral ceremony for the commander, Fouad Shukur, who was killed in an Israeli strike in Beirut this week. In Tehran, Iran's supreme leader prayed over the body of Ismail Haniyeh, the Hamas leader. Iran has vowed revenge for the killing of Haniyeh in a blast believed to have been carried out by Israel. The killings have raised fears of a wider war.