An activist involved in anti-government protests in Hong Kong has been shot in the chest by police during a clash, reports BBC.
The incident came as thousands of people demonstrated in defiance of a protest ban for the 70th anniversary of Communist rule in China.
Though people have been shot by rubber bullets in previous protests, this is the first injury from a live round.
In the Chinese capital Beijing, 15,000 soldiers paraded with advanced military hardware to mark the anniversary.
Nearly four months of protests in Hong Kong have challenged Chinese President Xi Jinping's vision of national unity.
Earlier, the Chinese flag was raised at a special ceremony in the territory. Security was tight and the 12,000 invited guests watched the event on a live video feed from inside a conference centre.
On what is being described by protesters as a "day of grief", people took to the streets in central Hong Kong and at least six other districts, blocking roads in some areas.
What happened to the man who was shot?
Videos of the shooting incident show protesters with umbrellas and metal poles clashing with police, one of whom discharges his weapon.
Another video shows the injured man - a student - lying on the ground, saying: "Send me to hospital. My chest is hurting, I need to go to hospital."
A classmate of the protester told the BBC that the man's injuries were not life-threatening.
"We felt horrible when we saw him suffer in the video," he said, adding that fellow students wanted to start a crowdfunding campaign for him.
Police tried to disperse the protesters - who were armed with umbrellas, projectiles and petrol bombs - with tear gas, rubber bullets and water cannon spraying blue dye to make it easier to identify them later.
Protesters are in retreat but have been setting fire to barricades as they go. Many were seen being wrestled to the ground by police, some of them bleeding.
At least 15 metro stations and numerous shopping centres in the city have been closed, and some 6,000 officers have been deployed in the territory.
An annual fireworks display had earlier been cancelled.
Protests in Hong Kong by now follow a familiar rhythm - peaceful mass marches which then slide into violence. What stood out today however was the swiftness with which the violence exploded.
Across many parts of Hong Kong, protesters fought pitched battles with police, with one clash culminating in a young man getting shot by a live round. Authorities appeared to show a new determination to put down the protests as quickly as possible on China's National Day, perhaps to save face, but it inevitably only angered the protesters even more.
On the streets of Hong Kong Island's dense downtown, from Admiralty to Causeway Bay, protesters played cat and mouse with police, setting a trail of fires in their wake. Police relentlessly attempted to box them in by sending water cannon and elite forces down main roads, while smaller teams charged up side streets.
But at times the tactics on both sides made little sense and threatened to spin out of control. Petrol and smoke bombs alike were sometimes hurled inexpertly, seriously endangering reporters and passers-by.
In Admiralty, I saw protesters armed just with umbrellas repeatedly attempting to charge up an escalator to an overhead bridge where riot police were stationed. After shouting warnings, police let loose a barrage of tear gas directly at the protesters, shot at extremely close range. Then in Wan Chai, protesters decided to set a bonfire right in front of a petrol station that was sandwiched between residential blocks - it was quickly put out.
Dusk settled; the mayhem continued. I'd started the day with a peaceful, festive mass march that began in Causeway Bay, and hours later found myself right back where I'd started, this time dodging fires and running from police, following that Hong Kong protest rhythm to its inevitable bitter end.
What is the background to this?
Hong Kong has been a part of China since 1997 but has its own system of law and government - known as One Country Two Systems.
In recent years, there has been increasing opposition to what has been seen as the growing influence of Beijing on Hong Kong's society and politics.
Hong Kong always sees anti-Beijing protests on 1 October, and this year they were expected to be larger than ever, because of the months of unrest triggered by proposed changes to the extradition law.
The changes would have made it possible for China to extradite people to the mainland from Hong Kong, something opponents felt put Hong Kongers at risk of persecution in unfair trials.
For nearly four months, protesters have taken to the streets - at times reported to be in the millions.
The proposed changes to the extradition law have officially been scrapped but that has failed to quell the unrest, which has now evolved into an existential battle over Hong Kong's future.
