Facebook has disrupted what it says is a China-based espionage campaign against Uyghur Muslim journalists, dissidents and activists living overseas, including in the United States, the social media giant announced Wednesday.

The firm said it disrupted the hackers’ operations, which were carried out in part through the platform, and notified the targets. The victims belong to China’s Muslim minority and now live in countries such as Turkey and Kazakhstan, the firm said.

The announcement came as the United States, Britain, Canada and the European Union this week announced sanctions on Chinese officials for violating the human rights of its Uyghur minority, whose forced assimilation and detention in reeducation camps in northwest China has drawn international condemnation.

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