Deputy leader Carrie Lam warned there was currently "no room for negotiations" between the authorities and protesters, urging them to move out of rally sites after a court authorised bailiffs to call on police if they were stopped from carrying out clearances.
"The police will stay in touch with the (court order) applicants and the bailiffs. We are making plans for actions that need to be taken. I believe that soon, police will get in touch with the relevant parties to make such preparations."
Police also declined to comment.
Now in their second month, demonstrators are occupying three sites around the city.
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They are calling for fully free leadership elections in 2017, but Beijing has insisted that all candidates be screened by a loyalist committee which protesters brand "fake democracy".
"I strongly urge protesters who are still staying in the occupied areas -- whether the areas are covered by the injunctions or not -- they should voluntarily and peacefully leave... As soon as possible," Lam said.
Yesterday's order ruled that "any police officer be authorised to arrest and remove any person who the police officer reasonably believes or suspects to be obstructing or interfering (with) any bailiff in carrying out his or her duties".
Talks with the government over political reform have proved fruitless, with protest leaders now saying they want to take their demands direct to Beijing.
But China has consistently backed the Hong Kong administration, led by embattled chief executive Leung Chun-ying.