Police have stepped up security measures at Jewish sites in Zurich following a serious knife attack on an Orthodox Jewish man in the Swiss city overnight, local police said on Sunday. Police said they had taken action after a 15-year-old Swiss youth was arrested for inflicting "life-threatening" injuries on the 50-year-old Jewish man in central Zurich on Saturday night. A Zurich police statement said it was not clear what sparked the attack, but that investigations were "explicitly including the possibility of a crime motivated by antisemitism." The extra security was put in place for "specific locations with a Jewish connection," police said, following discussions with local Jewish organizations. They gave no further details. (Reuters)

