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.
Israel to allow international force into Gaza, Israeli official says
Israel will allow a multinational security force to enter Gaza as proposed under US President Donald Trump's ceasefire plan for the enclave, an Israeli official said on Sunday, a day before Prime Minister Benjamin Netanyahu heads to Washington.
Firefighters battle blazes near France's Bordeaux, Macron in crisis talks
Firefighters battled throughout the night and into Monday morning to tackle huge wildfires threatening the French city of Bordeaux.
Kuwait strongly condemns repeated Houthi attacks on ships in Red Sea
The Kuwait Ministry of Foreign Affairs on Sunday strongly condemned the repeated attacks by the Houthi group on ships in the Red Sea, the last of which was on Saudi ship NCA MASA while sailing in the Red Sea.
Trump gives Iran talks 'room', US ambassador to UN says
US President Donald Trump has paused attacks on Iran to allow more room for diplomacy, the US ambassador to the United Nations told Fox News.
Southern China faces torrential rain, flood risk after Typhoon Noul hits land
Typhoon Noul will dump heavy to torrential rains across much of southern China for two days, authorities said, after sweeping the province of Guangdong and neighbouring Hong Kong with gale-force winds, following landfall on Sunday.
2:00pm - 6:00pm
Brent Black has the biggest stories of the day and the stuff you might have missed.
National Treasure <New>
Drake
Umbrella
Rihanna and Jay Z
Dai Dai
Shakira & Burna Boy