“Unfortunately, terrorist organizations are encouraging and inciting children to be involved in terror attacks against Israeli civilians,” a police statement said. The round of violence began Thursday when Israeli soldiers in the Jenin area of the West Bank clashed with Palestinian gunmen, killing nine. Police reinforced their presence in Jerusalem and a national counter-terror unit took up permanent position in the city. The Friday attack, which culminated in the killing of the 21-year-old Palestinian from an east Jerusalem neighborhood, sparked exceptional outrage since the dead were worshipers leaving Sabbath prayers. “These terrible events demonstrate once again how urgent it is to reverse this spiral of violence,” the statement said.