More than 200,000 voters took part in the election to select candidates who stand the best chance of success in Legislative Council elections in September.
On the eve of the primaries, police searched the office of independent pollster Robert Chung, whose Hong Kong Public Opinion Research Institute helps organise the election, raising concerns among activists of interference in the poll.
Police said the seven arrested – five men and two women – could face up to 10 years in prison for "assisting" a man suspected of stabbing a police officer during a protest against a new national security law on July 1.
Prime Minister Scott Morrison announced a range of visas that will be extended from two to five years and offered pathways to permanent residency visas. It is not clear how many Hong Kongers are expected to get the extensions.
Hong Kong leader Carrie Lam hailed the opening as "a historic moment" and said China's intelligence apparatus would be an "important partner" in helping to safeguard national security.
TikTok to exit Hong Kong market within days, while other technology companies, including Facebook, WhatsApp, Telegram, Google, Zoom and Twitter, suspend processing government requests for user data in the region over Beijing's new security laws.
Twitter said it had suspended all information requests from Hong Kong authorities immediately after the law went into effect last week.
Last week, China enacted a security law outlawing four national security crimes: subversion, secession, terrorism and colluding with foreign forces.
Hong Kong public libraries have placed certain books under review to see whether they "violate the stipulations" of a new national security law that China imposed on the financial hub.
Activist Nathan Law who declined to disclose his whereabouts for safety has said that he left because Hong Kong needs an advocate for democracy who can work internationally.
The legislation imposes sanctions on Chinese officials engaged in a crackdown on Hong Kong. It also penalises banks doing business with Chinese officials who implement Beijing's new national security law on the semi-autonomous city.
The Chinese embassy in London said "all Chinese compatriots residing in Hong Kong are Chinese nationals" responding to UK's remarks on offering citizenship to Hong Kongers amid the new security law in the country.
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