HONG KONG (REUTERS, AFP) - Anti-government protesters blocked roads with iron railings near a stadium where Hong Kong leader Carrie Lam held a public meeting on Thursday (Sept 26).

It was not immediately clear if Mrs Lam had left.

Police raised a blue flag warning of force if protesters did not disperse, a move commonly followed by tear gas in more than three months of sometimes-violent protests.

Residents turned on Mrs Lam in the talk, criticising her for curbing electoral freedoms, as she began the first "open dialogue" session with the public.

During the evening talks, Mrs Lam dismissed accusations that the meeting was a public-relations exercise, saying she was there to listen as she admitted trust in her government had "fallen off a cliff".

"The biggest responsibility lies with myself, I won't shirk the responsibility," she said.

More than 20,000 people applied to attend Thursday's meeting, with the authorities picking 150 people in a lottery.

Questions were chosen at random and, compared to the angry demonstrations on Hong Kong's streets this summer, the atmosphere remained cordial inside the sports stadium where the gathering took place.

Mrs Lam received little sympathy from audience members who rounded on her with speech after speech highlighting a litany of complaints towards her administration.

Most called on her to launch an independent commission of inquiry into allegations of police brutality and how the protests have been handled.

"The police have become a political tool of the government and right now there is no way to check police abuses of power," one woman said, hiding her face with a surgical mask.

"Everyone has lost confidence in police," another female audience member said. Another said police had been left to deal with an issue that can only be solved politically.

Others called for universal suffrage. Currently, the chief executive is chosen by a pro-Beijing committee and only half the city's lawmakers are directly elected.

"You say you want to listen to the people, but the people have been voicing their demands for three months," one male attendee said.

'Political blackmail'

Of the 30 people chosen to speak throughout the evening, 24 openly criticised the government, two made neutral comments while four expressed sympathy for Mrs Lam's administration.

But it is unclear what, if anything, Mrs Lam can offer.

Both she and Beijing have ruled out any further concessions to protesters, whose five demands include an independent inquiry into police conduct, an amnesty for more than 1,500 people arrested and fully free elections.

On Wednesday, a top Chinese envoy in the city described those demands as "political blackmail", raising concerns that Mrs Lam has been given little wiggle room to de-escalate simmering public anger towards her administration and the police.

Throughout her appearance on Thursday, Mrs Lam resisted making concrete commitments beyond continuing to listen to people and holding more town halls.

Hong Kong has seen years of rallies and unrest sparked by Beijing's tightening grip on the semi-autonomous financial hub.

This summer's unrest was ignited by a now-scrapped proposal to allow extraditions to the authoritarian mainland.

But it has since snowballed into a wider movement pushing for democracy and police accountability after Beijing and Mrs Lam took a hard line.

After the prosecution of previous democracy activists in recent years, this movement has been deliberately leaderless and largely organised online.

But that has made it difficult for Mrs Lam's administration to know who to reach out to for talks.

The city is bracing itself for a fresh round of protests in coming days with Saturday marking five years since the pro-democracy Umbrella Movement kicked off and next Tuesday being the 70th anniversary of communist China's founding.