Masked men attacked passengers after storming a train station in Hong Kong's Yuen Long district on Sunday.
Police say dozens of people are injured with one person in critical condition.
It comes after the latest pro-democracy rally in the centre of Hong Kong.
Demonstrations were also protesting against a controversial bill that allows extraditions to mainland China.
It's still unclear who the mob was or why the attacked the passengers.
Kuwait and Qatar thwart fresh wave of Iranian attacks
Kuwait and Qatar reported intercepting multiple Iranian attacks.
After a week of war, Trump demands Iran's 'unconditional surrender'
US President Donald Trump demanded Iran's 'unconditional surrender' on Friday, a dramatic escalation of his demands a week into the war he launched alongside Israel, which could make it more difficult to negotiate a swift end to it.
Ex-rapper's party set to sweep Nepal election
A three-year-old party led by rapper-turned-politician Balendra Shah looked set to sweep Nepal's general election on Friday, trouncing established rivals in a result analysts likened to a "tsunami".
Israeli airforce pounds Beirut, Lebanon death toll rises
Israel pounded Beirut's southern suburbs with airstrikes on Friday, stepping up a war with Hezbollah that has forced hundreds of thousands of Lebanese from their homes and killed more than 200, according to a health ministry toll.
US releases Epstein-related FBI interviews mentioning Trump
The US Justice Department released FBI records on Thursday that summarise interviews of an unidentified woman who made accusations against President Donald Trump.
UAE President His Highness Sheikh Mohamed bin Zayed Al Nahyan has visited a number of people injured in the Iranian attacks who are receiving treatment in hospital.
UAE President His Highness Sheikh Mohamed bin Zayed Al Nahyan has received a phone call from Philippine President Ferdinand Marcos Jr., during which they discussed the situation in the region amid ongoing military escalation.
Dubai Humanitarian says it remains fully prepared to adapt and scale its support in response to the needs of its member organisations and partners.
