Open this photo in gallery: A woman walks past a building tagged with Stars of David in Paris, France, on Oct. 31.LUCIEN LIBERT/Reuters Two couples who allegedly stencilled dozens of blue Stars of David on buildings in Paris and two of its suburbs last week are linked by a third party living abroad, the Paris prosecutor said Tuesday. The link was based on a telephone conversation by one couple in Russian, a statement said. “At this stage, it is not excluded that the markings of the blue Stars of David in the Paris region were made at the explicit demand...