Masks, bulk orders of umbrellas, sticks also barred.
Speakers urge America to pass human rights act to ensure democracy for former British colony.
Troops also blocked access to its main business centre with razor wires.
Lam says protestors would have the opportunity to express their unhappiness.
More violence are expected in Hong Kong over the weekend.
'Grandpa Wong' is a regular sight at Hong Kong's street battles, hobbling towards police lines, placing himself in between riot officers and hardcore protesters.
There were some standoffs between protesters and police in Tung Chung as authorities fired tear gas at demonstrators, but there was no sign of violence.
Protesters plan to block traffic to Hong Kong International Airport on Saturday, just a week after thousands of demonstrators disrupted transport links.
An afternoon rally in the district of Tsuen Wan spiralled into violent running confrontations with at least one police officer firing his sidearm during pitched battles with protesters.
Protestors express anger at the police by staging violent protests, for failing to prosecute mobsters involved in a subway station attack.
Mainland investors have made the most of the slump in Hong Kong-listed equities, purchasing stocks through exchange links every day this month.
Indian police insist that Kashmir, which Pakistan also claims, has been mainly peaceful since a curfew was imposed.
The fleeing activists are part of the group that smashed into Hong Kong's Legislative Council on July 1.
Violence has now escalated further as protestors charged into a shopping complex clashing with the police causing more chaos in Hong Kong.
The latest protest comes a day after police said three political activists had been killed since the weekend.
There are no reports of any casualties or arrests.
At around 11.00 am (1000 GMT), thousands of protesters gathered near the Gare de Lyon train station for a march towards the Arc de Triomphe.
In the case of the youngest to be killed, a bullet entered the back of 17-year-old J. Snowlin's head and exited through her mouth.
Macron says there must be order, calm and harmony now.
Police said the protestors had tried to break through a cordon several times but had been prevented from doing so, with tear gas used more than once.
The protesters, who linked arms along Whitehall in the heart of London's political district, then delivered a letter to Prime Minister Theresa May saying they were extremely concerned at stalled Brexit negotiations.
Listed by Forbes magazine as one of the world's richest men, Soros is accused by nationalists around the world of sponsoring protests and seeking to push a liberal, multicultural agenda.
The protests were called online by a grassroots group, Committees for the Defence of the Republic (CDRs), founded to help stage last year's banned referendum and now demanding a clean break with the Spanish state.
After a weekend of protests in which right-wing extremists vastly outnumbered counter-protesters, a huge crowd estimated by city authorities as 50,000 people massed at the Chemnitz free concert Monday.
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