Clearly, not Hamas and clearly not from Gaza

"When Israeli troops arrived, militants detonated explosives buried beside the road, and returned Israeli fire for hours from two sites a mile or two apart. The attackers were so persistent, or well-trained, that one of the Israeli dead, an officer in the police anti-terror task force, was killed after dark. The Israeli defense minister's roadside press conference was abruptly adjourned when fire erupted again." (thanks Laleh)