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.
Russian drone, missile attack on Kyiv hits residential buildings
Russian forces attacked the Ukrainian capital Kyiv overnight killing at least two people and injuring more than a dozen, as drones and missiles struck residential buildings and started a fire in a hotel on a central boulevard.
US, Iran talks conclude in Doha, focused on Strait of Hormuz
Iran and the US concluded a round of indirect talks on Wednesday with no sign they had made headway toward a lasting peace, focusing instead on issues that they said had been resolved when an interim agreement was announced two weeks ago.
Trump honours Theodore Roosevelt in North Dakota, debuts new Air Force One
President Donald Trump dedicated a museum honouring Theodore Roosevelt on Wednesday, invoking the Republican president's legacy and linking it to his own vision for America ahead of the country's 250th anniversary.
Kenyan court charges 8 schoolgirls with fellow students' murder
A Kenyan court charged eight schoolgirls on Wednesday with murder for the deaths of 16 of their fellow students in a dormitory fire at a school in late May.
At least 5 people killed in fire in Antwerp apartment block
At least five people were killed in a fire in a 10-storey apartment building in the Belgian city of Antwerp on Wednesday, police said.
6:00am - 10:00am
Kris, Priti and Rossi host the UAE's biggest radio show. It's full of fun, laughs and it's Where The Stars Live.
10:00am - 2:00pm
Good vibes and loads of hit music!
Let Me Be <Kfs>
The Second Voice & Elvin Cena
I Just Might
Bruno Mars
Die For You
The Weeknd & Ariana Grande