HONG KONG: Hong Kong police cleared more barricades Tuesday from pro-democracy protest zones that have choked off traffic in key business districts for more than two weeks, signaling authorities’ growing impatience with the student-led activists.

Appearing to use a strategy of gradually chipping away at the three main protest zones, hundreds of police fanned out in the early hours to take down barriers that the protesters had erected overnight. Officers used electric saws and bolt cutters to take down bamboo scaffolding built in the Admiralty area after a mob of masked men stormed some of the barricades the day before.

A few dozen protesters who sat guarding one entrance to the main occupied zone after the police came were exhausted but defiant.

“I’m feeling a bit lost. There is no dialogue with the government, and the truth is we are affecting people’s lives. But we can’t bear to leave without getting any results,” said Mark Li, a 21-year-old college student who sat at the front facing a line of policemen. Li and his friends said they were not afraid of a crackdown but were weary of police tactics to weaken their movement.

“I just hope we can keep fighting in the long term. It won’t end so quickly — it’s just a stalemate at the moment,” said Jason Wong, 19.

Police used sledgehammers to smash concrete used by protesters to try to secure the barriers to the road. They dismantled barriers of plywood, trash cans, wooden pallets and other objects blocking the road, which runs parallel to a major highway that has become the protesters’ main camp.

Before dawn, when protesters’ numbers are lowest, police also removed metal barricades from another protest camp on a road in the nearby Causeway Bay shopping area to free up a lane for traffic.

By gradually reducing the protest areas from the edges and acting during the quiet morning hours, the police appear to want to avoid the sort of combative confrontation — using tear gas and pepper spray — that backfired two weeks ago, when the street protests started.

Police will continue to take down the barriers, spokesman Steve Hui said. He said officers arrested 23 men in Monday’s violent clashes, when masked men and taxi drivers led a crowd of several hundred who tried to charge the protest zone.