HONG KONG: Hong Kong descended into chaos on Sunday night as riot police fired tear gas and rubber bullets at anti-government protesters hours after China`s office in the city was daubed with eggs and graffiti in a vivid rebuke to Beijing`s rule.

Acrid clouds of tear gas wafted through the city`s densely packed commercial district as police battled masked protesters after another huge protest march, with seemingly no end in sight to the turmoil engulfing the finance hub.

A group of masked, stick-wielding government supporters also descended on a group of protesters in a train station, beating multiple people including reporters who live-streamed the assaults.

Hong Kong has been plunged into its worst crisis in recent history by weeks of marches and sporadic violent confrontations between police and pockets of hardcore protesters.

The initial protests were triggered by a now-suspended bill that would have allowed extraditions to mainland China. But they have since evolved into a wider movement calling for demo-cratic reforms, universal suffrage and a halt to sliding freedoms in the semiautonomous territory.

Tear gas and rubber bullets have become frequent while the city`s parliament was trashed by protesters earlier this month as Beijing`s authority faces its most serious challenge since Hong Kong was handed back to China in 1997.

On Sunday tens of thousands of antigovernment protesters marched through the streets, the seventh weekend in a row that residents have come out en-masse.

But the march followed a now f amiliar pattern: a huge peaceful turnout followed by a night of running clashes with more hardcore groups.

Pro-Beijing vigilantes The attacks by masked men on protesters was a new escalation and will ratchet up fears that the city`s feared triad gangs are wading into the political conflict.

Sunday evening`s coordinated assault took place in Yuen Long, a district in the city`s New Territories near the Chinese border where the criminal gangs remain influential. Footage showed the men attacking protesters on the platform and inside trains.

Similar assaults by pro-government vigilantes took place against protesters during the 2014`Umbrella Movement` protests.

Earlier in the evening protesters had descended on the Liaison Office the department that representsChina`s central government which was pelted with eggs and daubed with graffiti.

`We are here to declare that Beijing is the one violating our governing values and judicial procedures,` a19-yearold protester, who gave his first name as Tony, said.

`You taught us peaceful marches are useless,` was one of the slogans sprayed on the Liaison Of fice walls.

Six weeks of huge protests have done little to persuade the city`s unelected leaders or Beijing to change tack on the hub`s future.

Under the 1997 handover deal with Britain, China promised to allow Hong Kong to keep key liberties such as its independent judiciary and freedom of speech. But many say those provisions are already being curtailed, citing the disappearance into mainland custody of dissident booksellers, the disqualification of prominent politicians and the jailing of prodemocracy protest leaders.

Authorities have also resisted calls for the city`s leader to be directly elected by the people.

Protesters have vowed to keep their movement going until their core demands are met, such as the resignation of city leader Carrie Lam, an independent inquiry into police tactics, amnesty and a permanent withdrawal of the bill.

They have also begun calling once more for universal suffrage.

There is little sign that either Lam or Beijing is willing to budge.-AFP