HONG KONG (AP) -- A Hong Kong anti-government protester was shot by police Monday in a dramatic scene caught on video as demonstrators blocked train lines and roads in a day of spiraling violence fueled by demands for democratic reforms.
Elsewhere, a man was set on fire following an apparent dispute over national identity in the semi-autonomous Chinese territory, which has been wracked by five months of protests. The man was in critical condition in a city hospital.
The violence is likely to further inflame passions in Hong Kong after a student who fell during an earlier protest succumbed to his injuries Friday and police arrested six pro-democracy lawmakers over the weekend.
Monday's video shows a police officer shooing away a group of protesters at an intersection, then drawing his gun on a masked protester in a white hooded sweatshirt who approaches him.
As the two struggle, another protester in black approaches, and the officer points his gun at the second one. He then fires at the stomach area of the second protester, who falls to the ground. The officer appeared to fire again as a third protester in black joined the tussle.
The protester in white manages to flee, bounding up a nearby stairway, and the officer and a colleague pin the two in black to the ground.
Police said that only one protester was hit and that he was undergoing surgery. A spokeswoman for the Hong Kong hospital authority said the person shot was in critical condition but gave no further details.
The incident marked the second time a protester has been shot since the demonstrations began in early June, although police have repeatedly drawn their firearms to ward off attacks. More than 3,300 people have been arrested in the protests.
Few details were available about the burning incident in the Ma On Shan neighborhood. Video posted online shows the victim arguing with a group of young people before someone douses him with a liquid and strikes a lighter.
Police fired tear gas and deployed a water cannon in various parts of the city on Monday and charged onto the campus of Chinese University, where students were protesting. Video posted online also showed a policeman on a motorcycle riding through a group of protesters in an apparent attempt to disperse them.
Police spokesman Tse Chun-chung said the shooting, burning and motorcycle incidents were all under investigation, but defended the officers' actions as necessary to safeguard their own safety. Tse said two people were arrested in the shooting incident, including the person shot, but no one has yet been detained over the burning.
Protesters built barricades and blocked roads at about 120 locations across the city of 7.4 million and demonstrations were still ongoing, Tse said.
"Continuing this rampage is a lose-lose situation for Hong Kong. Everyone is a loser," Tse said.
Rail service was partly suspended because of fires and obstacles on the tracks and windows smashed at a branch of the state-owned Bank of China. Large parts of the downtown business district were closed to traffic as protesters surrounded by onlookers engaged in a standoff with police.
The protests began over a proposed extradition law and have expanded to include demands for greater democracy and police accountability. Activists say Hong Kong's autonomy and Western-style civil liberties, promised when the former British colony was returned to China in 1997, are eroding.
The video of Monday's shooting was posted on Facebook by Cupid Producer, an outlet that started last year and appears to post mostly live videos related to local news.
The shooting occurred in a crosswalk at a large intersection strewn with debris that had backed-up traffic in Sai Wan Ho, a neighborhood on the eastern part of Hong Kong Island.
Protesters blocked intersections around the city and disrupted subway and commuter rail service. The rail operator, MTR, suspended service on several lines, and public broadcaster RTHK reported that a fire had been set inside a train at Kwai Fong station.
In a news release, the Hong Kong government said police had been responding to vandalism and disruptions to traffic, including protesters throwing heavy objects onto roads from above.
"During police operations, one police officer has discharged his service revolver, one male was shot," the release said, adding that officers also drew their guns in the Shatin and Tung Chung neighborhoods.
The release denied what it called online rumors saying police had been ordered to "recklessly use their firearms," calling the allegation "totally false and malicious"
"All police officers are required to justify their enforcement actions," the statement said.
A patch of what looked like dried blood could be seen in a cordoned-off area after the shooting, as onlookers shouted insults at the police.
Masked protesters continued to try to block other intersections in the area. Police chased them away with pepper spray, hitting some bystanders as well.
On Sunday, police fired tear gas and protesters vandalized stores at shopping malls in anti-government demonstrations across Hong Kong. They targeted businesses whose owners are seen as pro-Beijing and also damaged the Sha Tin train station.
Police said they arrested at least 88 people on various charges, including unlawful assembly, possession of an offensive weapon, criminal damage and wearing masks at an unlawful assembly.
In a sign of growing frustration on behalf of Hong Kong's leader, Carrie Lam, and her backers in Beijing, the administration on Saturday announced the arrest of six lawmakers on charges of obstructing the local assembly during a raucous May 11 meeting over the extradition bill. All were freed on bail.
The city has also been rocked by the death Friday of a university student who fell from a parking garage when police fired tear gas at protesters.
The territory is preparing for Nov. 24 district council elections that are viewed as a measure of public sentiment toward the government.
Pro-democracy lawmakers accuse the government of trying to provoke violence to justify canceling or postponing the elections.