Palestinian leaders have condemned Israel's killing of three Palestinians in the West Bank as a "dangerous escalation" in violence. Palestinian Prime Minister Salam Fayyad said Israel's raid in Nablus threatened security and stability in the area. Israel said the three men were behind a recent death of an Israeli settler. Separately, the Israeli army said three Palestinians suspected of trying to infiltrate from the Gaza Strip were killed near the Erez crossing. <br/><br/>