KINSHASA (Reuters) - Hundreds of people wielding wooden clubs have rampaged through parts of Congo's capital Kinshasa, smashing car windows and burning tyres in the third day of protests to rock the city.

The crowd chanted anti-United Nations and anti-government slogans on Friday, angry at their failure to stop renegade soldiers seizing the eastern border town of Bukavu earlier this week.

The United Nations said renegade soldiers in Bukavu had not fulfilled their pledge to pull out of town and that looting by dissident soldiers continued.

In Kinshasa, looters burned a police station near the central market just outside the main business district, stole weapons and started shooting in the air.

U.N. radio said five people had been killed on Friday. A doctor at Kinshasa's main hospital said he had received three dead with gunshot wounds and 20 injured, some seriously.

Witnesses said police had opened fire to disperse the demonstrators and killed at least one woman.

A foreign U.N. worker was pulled out of a car and beaten by a mob before being rescued by police. The residences of three U.N. employees were also been attacked and looted.

"People are afraid, the crowds are smashing the windows of any vehicles they see," said newspaper vendor Hilaire Kulenguluka. "All the shops are closed in town and police have blocked the main streets to the city centre."

The protesters said they wanted the U.N.'s 10,800 peacekeepers to leave the central African country. Some were also scratching slogans on the tarmac criticising the transition government, headed by President Joseph Kabila.

Most international flights to Kinshasa were cancelled. By late afternoon the protesters dispersed and calm returned.

RENEGADE GENERAL STAYS IN BUKAVU

The fall of Bukavu and the riots in Kinshasa are the most serious challenges to date to Congo's shaky peace process and its government, struggling to assert its authority across Africa's third-largest state after five years of war.

The violence has also reignited tension with neighbouring Rwanda, which invaded Congo in 1996 and 1998. Kabila has accused Kigali of helping the dissidents -- members of a former rebel group which is now part of his government.

Kabila said he understood the protesters' anger but called for an end to the demonstrations on Thursday, after thousands of people attacked U.N. compounds and warehouses in Kinshasa and other cities. U.N. guards shot dead three looters.

In Bukavu, about 1,500 km (940 miles) from the capital on the eastern border with Rwanda, the U.N. initially said on Friday some of the 4,000 renegade troops had moved out of the town as promised by their commander General Laurent Nkunda.

But most dissidents, who overran Bukavu on Wednesday, appeared to simply have pulled back from the city centre, while Nkunda pledged to stay put with some officers and guards.

"At this stage Nkunda has not yet respected his commitment and the U.N. is concerned that looting by dissident soldiers continues," U.N. spokesman Sebastien Lapierre said.

Nkunda, who has refused to join Congo's new national army, says he is fighting to protect his fellow Banyamulenge tribesmen -- Congolese related to Rwanda's Tutsis who have long complained of attacks and killings by security forces.

He says he recognises Kabila's government, but demands that the current military chief in the region be replaced.

Isberg said the United Nations, which has about 1,060 peacekeepers in and around Bukavu, would send reinforcements to the town and increase patrols.

The Congolese army is thought to have 1,000 men in the area after fleeing the town, which Kabila has vowed to retake.