Chinese authorities have widened a crackdown on human rights groups, detaining or questioning more than 50 lawyers and activists in a sweep over the past few days, rights groups say.
Citing the need to buttress national security and stability, President Xi Jinping's administration has tightened government control over almost every aspect of civil society since 2012.
In recent years, the government has detained dozens of Chinese for dissent and Tibetans and Uighurs have complained of rights abuses, prompting criticism from the United States.