While some passers-by clapped their hands in support, MTR staff milled around nearby, and the police took down the protesters’ personal details.

At Kowloon Tong, Mrs Wong, a 50-year-old social worker, wore a black T-shirt and dark trousers in support of the protesters and in opposition to the legislation.

“I feel dissatisfied with the government’s response,” she said. “There are different voices in this city, but the government does not listen at all.”

Despite the opposition, the city’s leader, Chief Executive Carrie Lam Cheng Yuet-ngor has said she has no intention of withdrawing the bill, which, if passed, would allow fugitive transfers to jurisdictions the city has not got an extradition arrangement with, such as mainland China.

Opponents fear the amendments to fugitive laws would leave Hongkongers at risk of unfair prosecution across the border.

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Keith Leung, a 26-year-old salesman, also wore black in support.

“We realise Hong Kong is in a difficult situation,” he said. “I want to support the protesters, but I need to go to work. So I’m wearing black to stand with them.

“I feel really upset after Wednesday’s demonstrations. There were so many younger people who protested – shouldn’t the government listen to what we say?”

On Sunday, there are plans for a second march from Victoria Park in Causeway Bay to Admiralty.

A 26-year-old lawyer, who was dressed in black and wished to remain anonymous, told the Post she would join the march.

“We have protested and marched, but the government still turns a deaf ear to us,” she said. “We need to show our attitude.”

Outside government headquarters at Tamar Park, Felix Tsang and a group of worshippers, some in black outfits, protested by singing hymns.

The group started in the early morning of June 11, and have been trying to keep going for three days.

“We are preaching a peaceful resolve and do not want to see any more violence,” he said.

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Tsang, 21, is a student on a semester’s break from his university. He said the Christian group gathered spontaneously and came from all denominations, united in a common goal to see the extradition bill withdrawn.

“We are praying for everyone involved, including Carrie Lam.” he said.

About 200 people took another form of petition by singing a hymn in Chater Garden at lunch time, to voice their opposition to the bill and pray for the government.

Volunteers donated boxes of water to the group amid the sweltering heat.

Calvin Lai, 26, an accountant, joined the group, who came from all walks of life and did not know each other to sing, Sing Hallelujah to the Lord, which has been widely heard in the past week outside the government headquarters.

“I hope through the worship and prayers, Hong Kong and people’s hearts are healed,” Lai said. “I want to honour those younger people who went to the front line to protest against the bill on Wednesday. They are not stupid and put their love of Hong Kong before their careers or personal futures.”

He said he would join the march on Sunday.

On Thursday, disturbances including the obstruction of carriage doors and pressing emergency buttons were recorded on 20 MTR trains, which delayed services from between two and 20 minutes.

In response to Wednesday’s clashes, transport industry stakeholders urged protesters to refrain from obstructing road traffic.

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The Land Transport Alliance said some taxi drivers suffered a 50 per cent drop in daily income after Admiralty was virtually paralysed. The alliance, which consists of 70 transport unions, embracing taxis, non-franchised buses, school buses, public minibuses and trucks.

Frankie Yick Chi-ming, a member of the alliance and lawmaker for the transport sector, said it respected freedom of expression and the right to protest, but it was calling for a peaceful rally without causing havoc for traffic and social order.

Meanwhile, a Hospital Authority spokesman said the primary concern of public hospitals was ensuring patient safety during the procedure of saving lives, which would not be affected any non-clinical activities.

He added that all patient information was collected on the basis of clinical needs, and staff had to observe rules in accessing the information.

“There is a well-established procedure, including proper documentation, in handling requests for patients’ information from law-enforcement officers,” the spokesman said.

He also said that in the event of providing figures regarding injuries in major incidents, the authority would only release the overall number without providing information about individual patients.

Two university students and a teacher at the prestigious Diocesan Girls’ School, were arrested by police after receiving treatment at public hospitals on Wednesday.

A senior doctor working in a public hospital’s emergency department, who declined to be named, said doctors should not disclose a patient’s medical condition without consent. But he said reporting a crime to police is another issue.

“For example, if a doctor found out that a patient had committed a murder, he could report it to police. But he should not tell police what exactly the illness or injury is without the patient’s consent,” the doctor said.

Additional reporting by Elizabeth Cheung, Linda Lew and Rachel Yeo.