Fiery clashes erupted across the city, with security chief John Lee cautioning "unthinkable" consequences if the violence continued.
Authorities have shut down schools, rail links and several businesses in the Asian financial hub as a safety precaution.
On Tuesday night, hundreds of black-clad protesters tried to block riot police from entering the Chinese University of Hong Kong (CUHK) near Tai Po by hurling bricks and petrol bombs.
US carries out 'defensive' strikes on Iran's Qeshm Island, officials say
The United States has carried out strikes on Iran's Qeshm Island in the Strait of Hormuz, a US official said on Monday.
Kenya discharges five Ebola patients, no new cases reported
Kenya on Tuesday discharged five Ebola patients from hospital after laboratory tests confirmed they had cleared the virus.
Bomb threats reported on two passenger planes to Warsaw, both land
A passenger plane from London made an unscheduled landing at Warsaw-Modlin airport in Poland after a bomb threat alert on Tuesday, forcing the airport to close, and another plane from Copenhagen was being checked at Warsaw-Chopin airport.
Lahore, Delhi choke as air pollution spikes in parts of South Asia
Air quality deteriorated sharply in parts of northern India and adjoining Pakistan on Tuesday, with the onset of pre-winter smog making Lahore the world's most polluted city and authorities in Delhi imposing curbs to fight the toxic haze over the capital.
Russian bombing kills 31 in village in southeastern Ukraine, local official says
At least 31 people were killed when Russian forces bombed a school being used as an aid distribution point in a village near the front line in Ukraine's southeastern region of Zaporizhzhia on Monday, a regional official said.
6:00pm - 7:00pm
An extra hour of the UAE's biggest radio show for your drive home.
So Easy (To Fall In Love)
Olivia Dean
Marry You
Bruno Mars
Ain't In La
Adéla