Updated at 8:30 p.m. BJT
Hong Kong MTR adjusted it's service on the Island Line, Tsuen Wan Line and South Island due to the current situation, according to a statement on its website.
The temporary measures include the closure of Sai Ying Pun and Admiralty stations and some exits at Sheung Wan Station.
According to the public transport network, a screen door in Wan Chai station was vandalized. Some traffic cones and railings were also thrown onto the tracks.
The MTR Corporation condemned the protesters' "irresponsible" acts of vandalizing facilities.
Updated at 8:00 p.m. BJT
Firefighters arrived at Hennessy Road to put out a fire set by protesters.
Police was also deployed to the scene to clean the site.
Updated at 7:40 p.m. BJT
Some violent protesters set up barricades and set fires at the Hennessy Road outside the Police Headquarters in Wan Chai of Hong Kong, the police said.
A huge plume of smoke can be seen as the blaze burned at the road.
The protesters also dug out bricks from the pedestrian walkway, damaging public property.
Protesters set fire at the Hennessy Road. /CGTN Photo
Updated at 7:00 p.m. BJT
Violent protesters threw bricks and petrol bombs, vandalizing Hong Kong SAR government buildings and the Legislative Council (LegCo).
Water cannons and tear gas are being used as a dispersal measure by the police in the Admiralty area.
In a statement, the Hong Kong police strongly condemned all violent acts by the protesters and urged them to stop and leave immediately.
Violent protesters threw petrol bombs at the Central Government Complex during Saturday's illegal assembly in Hong Kong. /CGTN Photo
Updated at 6:00 p.m. BJT
A group of protestors is currently gathering in the Admiralty area and vandalizing the special administrative region's Central Government Complex.
Police fired tear gas and opened water cannons to disperse violent protesters after their repeated warnings went ignored.
Some violent protesters threw petrol bombs into the Police Headquarters.
Updated at 5:10 p.m. BJT
A large group of protesters have taken to the streets in an unauthorized assembly, blocking traffic at Hennessy Road, Des Voeux Road Central and Connaught Road Central in the Hong Kong Special Administrative Region, the police said on Saturday afternoon.
"Police warn the protesters to stop their illegal acts and respect other citizens' rights while expressing their views," the police said in a statement.