Riot police have fired tear gas and rubber bullets at protesters in Hong Kong following a large pro-democracy rally in the city.
Officers charged demonstrators who threw objects at police lines.
The clashes came after marchers ignored a designated finish line, continuing on to China’s central government offices.
Mass protests have been held for weeks, initially over an extradition deal with mainland China but now covering other issues on democracy in Hong Kong.
Late on Sunday, riot police equipped with masks and shields were seen swarming towards protesters close to a ferry terminal on the main island.
Images outside of the liaison office, China’s central government building, show signs covered in graffiti. One of the slogans reads : “You taught us peaceful marches are useless.”
Some protesters also covered the CCTV cameras outside a police station with spray paint.
The latest rally was put on edge after a huge haul of explosives was found along with protest leaflets.
On Saturday, a counter-rally in support of the police and against protest violence drew tens of thousands.
Tear-gas, rubber bullets, the trashing of parliament by protesters and sporadic clashes have created the worst crisis in the territory’s recent history.
The Hong Kong government has since suspended trying to pursue the extradition bill.
The former British colony is part of China but run under a “one country, two systems” arrangement that guarantees it a level of autonomy. It has its own judiciary, and a legal system that is independent from mainland China.
It’s the seventh consecutive weekend of mass demonstrations and tens of thousands are marching at the traditional protest point on Hong Kong Island.
However, the route has been altered and is scheduled to stop at Wan Chai rather than Central, where the key government offices are located.
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But pro-democracy legislator Claudia Mo told Reuters news agency: “I think many people will just march on towards Central.”
She said the police were “terribly worried” about possible violence around the government and legislative complexes and police headquarters.
Metal barriers traditionally used to channel or keep out protesters – which have been taken by some of them to create barricades – have now been replaced by water-filled versions around key buildings.
Previous marches have largely been peaceful, but have sparked violence on the fringes. Last weekend’s protests left 28 people, including 13 police officers, injured.
Hong Kong police are still investigating. Three men are under arrest.
Officers discovered the haul when they entered an industrial building in the Tsuen Wan district on Friday evening.
They said they found 2kg (4.4lb) of the highly volatile TATP, as well as 10 petrol bombs, acidic substances, weapons including knives and metal rods, and gas masks and goggles.
There were also banners and leaflets opposing the extradition bill and a T-shirt bearing the logo of the pro-independence Hong Kong National Front group.
It took place in the central Hong Kong district of Admiralty on Saturday, attracting 103,000 people according to police, but more than 300,000 according to organisers.