Hong Kong pro-democracy protesters are vowing to stay until the last minute before authorities clear them off a highway where they've been camped out for more than two months.

Dozens of activists and hundreds of tents remained on the normally busy thoroughfare outside of city government headquarters on Wednesday, a day before police are scheduled to sweep them out.

Hong Kong's second-highest ranking government official stepped up calls for protesters to leave the site and warned others not to return, saying it could lead to confrontation.

The protesters began occupying the road in the Admiralty district and two other neighborhoods on Sept. 28 after police fired tear gas in a failed attempt to disperse them.

The demonstrators are demanding greater democratic reform than Beijing is prepared to allow Hong Kong.