Residents of a Chinese village in open revolt against local authorities said Tuesday they had received word a senior Communist official was headed there to urge against a planned protest march.

The villagers of Wukan in southern China have effectively been governing themselves since late September, when local Communist leaders fled residents angered by illegal land grabs.

For the last 10 days, the 13,000 residents have been living under police blockade, holding daily rallies within the village perimeter to demand that authorities free three community leaders detained over September rioting.

On Tuesday villagers said they had received word Zhu Mingguo, vice head of the provincial Communist Party committee, was heading to Wukan to try to negotiate and stop a planned protest march on government offices.

"I was told to meet with him tomorrow (Wednesday) morning," Lin Zulian, Wukan's provisional village leader, said.

"If our talks are successful we will not go on the protest march, but if we cannot reach an agreement we will march in the afternoon."

Provincial authorities said Zhu is heading up a special work team to investigate and resolve the land issue which has incensed villagers for years, Lin said.

Anger spiked again when a fourth detained man, Xue Jinbo, died in custody on December 11. The government has refused to return Xue's body to his family, prompting widespread accusations that he was beaten to death.

Lin said three things will be discussed at the Wednesday morning meeting.

"We want them to free our people, return Xue Jinbo's body to his family and declare that the Wukan provisional village committee is not an illegal organisation," the 65-year old former businessman said.

Although authorities have said Xue suffered a heart attack, another local official said Sunday the cause of death was still under investigation.

"So far we have found no evidence that Xue Jinbo's heart attack was linked to police torture," said Zheng Yanxiong, Communist party secretary for the prefecture of Shanwei, which oversees Wukan.

"If the police beat him to death then this is another issue... when a person dies in government hands, we must take responsibility," he added, in an apparent concession to villagers.

His speech was delivered on Sunday, but news of its contents only emerged on Tuesday when villagers in Wukan received a recording.

Angered by decades of government land grabs, the villagers of Wukan drove out local Communist officials in September, erecting roadblocks to stop them re-entering and electing their own leaders.

On Tuesday evening, in order to allow provisional leader Zhu to pass, villagers began tearing down the roadblocks set up several kilometres (1.5 miles) down the road from police barricades.

The village is in the wealthy southern province of Guangdong, China's manufacturing heartland, where thousands of protesters angered by pollution from a power station clashed with police in a separate incident Tuesday.

Witnesses said police fired tear-gas and beat demonstrators who stormed government buildings in the town of Haimen, demanding the coal-fired plant be moved.

AFP calls to the local government in Haimen went unanswered.

Police in China fire tear-gas, beat protesters: witnesses
Beijing (AFP) Dec 20, 2011 - Police fired tear gas and beat demonstrators who stormed government buildings in southern China Tuesday to protest against a power plant, witnesses said, in the country's latest violent unrest.

Residents of Haimen, a town in the province of Guangdong, are demanding the coal-fired plant be moved, saying it is damaging their health, demonstrators told AFP by telephone.

They said a 15-year-old boy had been killed and more than 100 others badly beaten by riot police, although this could not be independently confirmed.

AFP calls to the local government in the town of Haimen went unanswered.

A woman contacted by telephone at the local public security bureau denied there was unrest in the town, but later a report on the official state-run news agency Xinhua said thousands of villagers blocked an expressway for six hours.

Xinhua said the protest ended after local officials agreed to suspend a plan to build a second coal-fired plant and refer the matter to higher authorities.

Haimen is only around 115 kilometres (70 miles) northeast of Wukan village, where residents are in open revolt against the local government after what they say is years of illegal land grabs.

There is no indication that the protests are related, but they are part of an upsurge in social unrest in Guangdong, China's wealthiest province and the country's manufacturing hub.

Photos posted online purportedly of the protest scene showed dozens of police armed with batons and shields lined up along a stretch of road.

Other photos showed protesters surrounding a government building with dozens standing on the roof of the entrance.

A protester told AFP that 100 to 200 riot police had confronted residents and had fired tear gas.

"If they continue, we will come out tomorrow and keep protesting. They are starting to beat people now," the protester said, before hanging up.

Another demonstrator told AFP that 10,000 residents had blocked a highway into the town to "get attention" after the local government refused to see them.

"We are protesting because we want the power plant to move away. Lots of local people have illnesses such as cancer," a resident said.

State media reported last month that a 7.4-billion-yuan ($1.17-billion) expansion of a power plant in Haimen had failed environmental tests.

Toxic metals found in local waterways, such as lead, zinc and nickel, "exceeded the standard level", Caixin said.

Three decades of rapid economic growth have left most waterways in China severely contaminated and protests over environmental pollution are increasing.

The villagers of Wukan are threatening to march on government offices on Wednesday if their demands for the release of three community leaders and the body of a fourth, who died in police custody, are not met.

Villagers also want a full investigation into what they say are years of illegal land grabs that have cost many local farmers their livelihood.

The recent outbreak of unrest will be a key concern for stability-obsessed leaders in Beijing as they prepare for a once-in-a-decade transition of power that begins next year.

Despite attempts to censor the web and a virtual blackout in China's state-run media, weibos -- Chinese microblogs similar to Twitter -- have buzzed with news of the Haimen and Wukan protests.