Hours before the police operation, a masked protester came out from hiding and told reporters there were fewer than 20 others holed up inside.
With police now buying canisters from China, there are rising fears that the tear gas could release toxic chemicals including cancer-causing dioxin.
The announcement comes from Hong Kong’s new police commissioner as a police siege of the Polytechnic University continues with most of the protesters leaving the campus, but an unknown number still remains inside for days.
At least a few dozen were believed to still be at Hong Kong Polytechnic University on Thursday morning. Meanwhile, US President Donald Trump is expected to sign legislation in support of the protesters.
Hong Kong police confirm British man reported missing in late March was murdered in mainland China
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