[BBC News] One of the Catholic Church's most senior members has been arrested in Hong Kong for breaking China's national security law, police have confirmed.Cardinal Joseph Zen, 90, is one of four people detained for being associated with a now-defunct organisation that helped protesters in financial need.
The others are a Cantopop singer and actor Denise Ho, ex-legislator Margaret Ng, and academic Dr Hui Po Keung.
They are accused of colluding with foreign forces.
If found guilty, they could face life in prison.
Human Rights Watch called it a "shocking new low for Hong Kong."
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