The first notable attack in the Hamas campaign, in which 4 Israelis were shot to death. Hamas spokesman Abu Ubaida said, "this attack is a chain in a series of attacks, some have been executed, and others will follow".[22] Ma'an News Agency reported that an Israeli security official said that this was one of a series of “terrorist attacks” designed to foil the 2010 peace talks.[23] Khaled al-Batsh, a leader of Islamic Jihad, endorsed the Hamas killings, asserting that "“negotiations can only be stopped by a barrage of bullets."[24]