Iran has vowed to avenge the killing of Hamas’s political leader Ismail Haniyeh, who died in an overnight air strike in Tehran, according to Iranian media.

Hamas and Iran blame Israel for the strike - Israel hasn’t commented but has previously vowed to eliminate the group’s leaders.

The killing, which came just hours after an Israeli strike on a Hezbollah commander in Lebanon, has heightened fears of wider conflict in the Middle East.

It could also delay efforts to bring a ceasefire in Gaza, as Haniyeh was a key player in negotiations.