The Hong Kong community in Australia has urged the Federal Government to take a stronger stance against the territory's controversial extradition law changes, describing their response so far as "too bland".

Key points: Petition letters with 5,000 signatures are delivered to the Department of Foreign Affairs

Petition letters with 5,000 signatures are delivered to the Department of Foreign Affairs There are concerns Australian citizens could be extradited to China from Hong Kong

There are concerns Australian citizens could be extradited to China from Hong Kong People in Hong Kong will pursue another rally in front of the Legislative Council tomorrow

Hong Kong's legislature is pushing ahead with legal amendments that would allow case-by-case transfers of people from Hong Kong to countries it does not have an extradition treaty with, including China, despite a huge protest in the city on Sunday.

A spokesperson for Foreign Minister Marise Payne issued a statement to the ABC which said "the Australian Government is taking a close interest in the proposed amendments" and "the Australian Consul-General in Hong Kong has raised the issue with senior levels of the Hong Kong Government".

About 3,000 protesters took to the streets in Sydney in support of Sunday's "No China Extradition" march in Hong Kong. ( Supplied: Jane Poon )

But Hong Kong community leader in Melbourne, Jane Poon, told the ABC the statement is too weak.

"We think it is still not enough. The intensity of attention is still not enough to reflect the seriousness of previous events," she said.

"We think many [Australians] can't see and sense the risk, because the Australian [Government's] response is too bland."

"[Community members are] very worried, very opposed to it, because not only are we likely to be in danger when we go to Hong Kong, but also our family and friends living there."

'Australians may be arrested in Hong Kong'

Protesters gathered in cities around the world on Sunday, including in Melbourne. ( Supplied: Jane Poon )

Ms Poon's comments came as two petition letters with a combined 5,000 signatures were delivered to Department of Foreign Affairs offices in Sydney and Melbourne on Tuesday.

The letter outlined concern that Hong Kong people residing in Australia, or any Australian citizen deemed to have violated Beijing's law and was seen as a threat to China's "national security" who happened to be in the territory could be extradited to the mainland.

"There is a significant number of Hongkongers who have migrated to Australia and become Australian citizens and residents after the 1989 Tiananmen massacre and after the 2014 mass demonstrations, dubbed 'the Umbrella Revolution'," the letter stated.

"Many of these immigrants have remained vocally critical of the Chinese Government and its political control over Hong Kong.

"Their vocal public comments, though is protected in Australia under the umbrella of freedom of speech, is considered as a threat to the national security of the Chinese Government and a crime under the one-party rule in China.

"In the event that these Australian Hongkongers return to Hong Kong, their original place of birth, after the passage of the Extradition Bill, these Australians may be arrested in Hong Kong and extradited to China for incarceration on the basis that their comments, which is simply an act exercising freedom of speech and lawful in Australia, can be regarded as an illegal act posing threat to the national security of China."

Protesters' mass strike and another rally planned

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 6 minutes 50 seconds 6 m Pro-democratic MP Claudia Mo says Carrie Lam stands accused of being a "puppet" for Beijing.

Hong Kong's chief executive Carrie Lam yesterday sought to quell criticism of the bill and again pointed to safeguards in the legislation that would protect political rights.

She also rejected comments that she was a puppet of Beijing.

Shadow Foreign Affairs Minister Penny Wong said there were concerns about the message the proposed laws sent to foreign investment and foreign companies operating in Hong Kong.

"These are matters that I would assume and I would hope the Hong Kong authorities would take into account," she said.

Greens leader Richard Di Natale said in a statement he was deeply concerned at the Hong Kong Government's extradition agreement with China, and that the proposal would undermine the territory's independent legal system.

People in Hong Kong are pursuing another rally in front of the Legislative Council on Wednesday when the amendment will have its second reading.

Many Hong Kong protesters are calling for a mass strike by workers and students to be held across the city at the same time.