BEIRUT: A Hezbollah official said on Monday that Israel will be held accountable for killing prominent militant Samir Qantar in a strike in Syria over the weekend. 'If the Israelis think by killing Samir Qantar they have closed an account then they are very mistaken because they know and will come to know that they have instead opened several more,' senior Hezbollah official, Hashem Safeieddine, said at Qantar's funeral.