Thousands of secondary school students have been involved in Hong Kong's pro-democracy protests.
Mainland agents based in the office can, under a new law, investigate Hong Kongers for security crimes.
China is working to be the world's superpower "by any means necessary," Christopher Wray said.
The vehicle was travelling on a bridge in south-west China when it plunged into a reservoir.
It says the confirmed case of a herdsman in China's Inner Mongolia is being "well managed".
The move by the short-form video app comes after China imposed its new security law on the city.
Pro-democracy activist Joshua Wong issued a plea for the world to stand in solidarity with Hong Kong.
As Beijing focuses on state-owned companies, workers at smaller firms are being hit hard by the pandemic.
Twitter and Telegram also put a halt to processing data requests, but Apple has not commented.
Ofcom rules Chinese state TV was in breach when it aired the "forced confession" of a UK citizen.
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