Iran has vowed retaliation against Israel for the assassination of Hamas political leader Ismail Haniyeh, who was killed last week in Tehran. Senior Iranian officials told Reuters that only a ceasefire deal in Gaza would convince Tehran to hold back from direct retaliation against Israel.

Israel has not confirmed or denied its involvement in the assassination. Just days before Haniyeh was killed, Israeli armed forces killed senior Hezbollah commander Fuad Shukr, who was responsible for a missile attack on a soccer field in Israel’s Golan Heights that killed 12 children.