Hackers in China used fake Facebook accounts and impostor websites to try to break into the computers and smartphones of Uyghur Muslims, the social network said Wednesday.The company said the sophisticated covert operation targeted Uyghur activists, journalists and dissidents from China's Xinjiang region, as well as individuals living in Turkey, Kazakhstan, the U.S., Syria, Australia, Canada and other nations.The hackers tried to gain access to the computers and phones by creating fake Facebook accounts for supposed journalists and activists, as well as fake websites and apps intended to appeal to a Uyghur audience. In some cases, the hackers created lookalike websites almost identical to legitimate news sites popular with Uyghurs.The accounts and sites contained malicious links. If the targets clicked on them, their computers or smartphones would be infected with…