Tens of thousands of people took to the streets of Hong Kong again Saturday in protest against the government's inaction over a now-suspended extradition bill and police use of excessive force.

The protestors marched in the Mongkok district on the Kowloon Peninsula, a densely populated area where clashes frequently broke out between protesters and police in past demonstrations.

"We want to emphasize our demands and condemn police brutality against protesters in the march," rally organizer Ng Wing-tak said before the march.

Ng said around 120,000 people attended the rally, while police put the turnout at just 4,200 on the authorized route.

Lawmaker Claudia Mo said that the extradition bill, which has sparked the Chinese-ruled city's biggest crisis in decades, could be Hong Kong's final battle.

"Systematic violence is more hideous. We are not giving in, we are not giving up. We Hong Kongers will fight on, fight on for our children," she said.

The crowd continued beyond the march's destination and blocked off a 3-kilometer stretch of Nathan Road, the major north-south thoroughfare leading towards the tourist hotspot Tsim Sha Tsui.

Later in the day, some of the protesters briefly blocked the Hung Hom Cross Harbour Tunnel, one of three major car tunnels connecting Hong Kong Island and the Kowloon Peninsula, stopping traffic for about an hour.

The protesters, claiming that extreme measures are needed to get a reaction from the government, continued to occupy Nathan Road by nightfall. They surrounded the Tsim Sha Tsui police station, throwing bricks at police vehicles in its parking lot and setting fire to cardboard at its entrances.

Riot police were deployed to disperse the crowd shortly after 9:20 p.m., firing tear gas on Nathan Road while pushing their way forward. The protesters facing off against the police behind makeshift barricades were seen retreating.

Protests have been held almost every weekend since June against the government's effort to amend a law that would allow the transfer of fugitives to mainland China and other jurisdictions.

Although Chief Executive Carrie Lam has suspended the legislative process in an attempt to restore calm, protesters are calling for the bill's full withdrawal.

Their demands have also grown to include greater democracy, the release of those arrested and an inquiry into alleged police misconduct.