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.
Trump says US could restart Iran strikes 'if they misbehave'
US President Donald Trump said on Saturday he had been told about the concept of a deal with Iran, but was waiting for the exact wording, while warning there was still the possibility of restarting strikes on the country if Tehran misbehaves.
Israeli military urge southern Lebanon residents to evacuate
The Israeli military issued an urgent warning on Sunday to residents of 11 towns and villages in southern Lebanon, urging them to evacuate their homes and move at least 1,000 metres (3,300 feet) away to open areas.
Russia's Primorsk port hit as Ukraine launches wave of drone strikes
Ukrainian drones attacked Russia's Baltic Sea port of Primorsk on Sunday, temporarily setting it on fire, local governor Alexander Drozdenko said on the Telegram messaging app, as Kyiv launched a wave of strikes on targets across the country.
At least six dead, thousands displaced as heavy rains hit northeastern Brazil
Heavy rains that hit northeastern Brazil over the last 48 hours have killed at least six people and displaced thousands in the states of Pernambuco and Paraiba, the federal government said in a statement on Saturday.
Austrian police arrest man over poisoned baby food case
Austrian police have arrested a 39-year-old suspect on Saturday in connection with a case in which rat poison was placed in jars of baby food in what their German manufacturer called an attempt to extort it.
Raindance
Dave & Tems
Young Blood
5 Seconds Of Summer
Callin' U (Tamally Maak)
Elyanna
