Suspected Palestinian gunmen killed an Israeli-American motorist in the occupied West Bank on Monday after Jewish settlers rampaged through a Palestinian village in a burst of violence that defied US efforts to prod the sides to cooperate on security. Israeli officials said in the latest incident Palestinians carried out several drive-by shootings on a highway near Jericho, killing an Israeli in his car before fleeing. The US State Department said the person killed was also a US citizen. Israel reinforced its West Bank garrisons after two brothers from a Jewish settlement were shot dead on Sunday, triggering the rampage by settlers in which a Palestinian was killed, scores were hurt and dozens of cars and homes were torched. At a regular briefing for reporters, State Department spokesperson Ned Price condemned attacks by both sides and welcomed statements by Prime Minister Benjamin Netanyahu calling for a cessation to what Price described as "vigilante violence" by settlers. "We expect the Israeli government to ensure full accountability and legal prosecution of those responsible for these attacks, in addition to compensation for the lost homes and property," Price said.