Twitter has failed to reveal the authors of anti-Semitic tweets after a French court mandated the company do so, reports the AFP. The January court ruling required that Twitter hand over user data to help identify hate speech authors who live under the jurisdiction of French laws. The suit was originally filed by France's Union of Jewish Students (UEJF), and the UEJF has now announced that it is taking further legal action against Twitter for claims that it has not complied with court orders.