In Pics | Hamas chief Ismail Haniyeh killed in Tehran

Hamas leader Ismail Haniyeh was assassinated in Tehran, Iran's paramilitary Revolutionary Guard said early Wednesday. (AP Photo/Vahid Salemi)

Haniyeh, Hamas' political chief in exile who landed on Israel's hit list after the militant group staged its surprise Oct. 7 attacks, was killed in an airstrike in the Iranian capital early Wednesday. (AP Photo/Vahid Salemi)

Haniyeh was targeted by an airstrike at a “residence in Tehran”, Hamas said, after he travelled to the Iranian capital for the inauguration of the country’s new president, Masoud Pezeshkian. (AP Photo/Vahid Salemi)

A senior Hamas official condemned Haniyeh’s killing as a “cowardly act that will not go unpunished.” Mediators Qatar and Egypt cautioned that the assassination would likely hinder progress on ceasefire negotiations and efforts to secure a deal for the release of hostages held in Gaza. (AP Photo/Vahid Salemi)

Haniyeh’s death followed Israel’s claim of killing Hezbollah’s top military commander, Fuad Shukur, in an airstrike on a south Beirut suburb. The strike was in retaliation for a rocket attack that killed 12 children over the weekend. (AP Photo/Mohammed Zaatari)

Streets in Ramallah, where the Palestinian Authority is based, were empty after Palestinian national and Islamic factions called for a general strike and mass demonstrations. (AP Photo/Majdi Mohammed)

The dual assassinations are significant setbacks for Hamas and Hezbollah and heighten the pressure on Iran, which supports both groups and has vowed to seek revenge. (AP Photo/Mohammed Zaatari)

Haniyeh’s funeral will take place in Iran on Thursday, with the country observing three days of mourning. His body will later be flown to Doha for burial. (AP Photo/Vahid Salemi)