Police fire tear gas at pockets of protesters across Hong Kong

Police in Hong Kong clashed with pro-democracy protesters at a number of locations across the territory on Sunday, during the 10th straight weekend of protests.

At least nine people, aged between 17 and 59, were injured in the protests, according to the Hong Kong Information Services Department.

One man was in serious condition and one man in stable condition, the information department said. Four other men and three women have been discharged from hospital.

A pro-democracy protester is held by police outside Tsim Sha Tsui Police station on August 11, 2019.

CNN teams witnessed riot police raising the black flag, which serves as a warning of tear gas, in several locations on Hong Kong island and across the bay in Kowloon during Sunday evening. Police clad in riot gear then fired tear gas canisters at the crowds in an attempt to disperse them.

The China national flag (L) is seen beside the Hong Kong flag in Hong Kong on July 2, 2019, a day after protesters broke into the government headquarters.

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Protesters initially congregated in Victoria Park for an “authorized” gathering. As they moved into surrounding areas, police said they were marching illegally and called on them to disperse.

Police said the demonstrators also set up barricades on Hennessy Road, blocking the thoroughfare and throwing petrol bombs at police officers.

A statement from police “condemned all violent acts by the protestors.”

“Residents of the area are advised to stay tuned to the latest situation and if necessary, keep their windows shut and stay indoors,” the statement said.

Meanwhile, thousands of activists continued their three-day sit-in at Hong Kong’s international airport.

Protesters throw back tear gas fired by the police during a demonstratrion in Sham Shui Po district in Hong Kong on August 11, 2019.

The protest is intended to be peaceful and has not caused a major disruption. Demonstrators were handing out postcards explaining their demands. In reaction, China has issued a ban on staff from Cathay Pacific Airways who have participated in the demonstrations.

Hong Kong has plunged into chaos over a controversial bill that would allow extraditions from the city to mainland China.

The bill has been shelved, but the protests have shown no sign of easing. Instead, they’ve evolved to include a range of demands, including greater democracy and an inquiry into alleged police brutality.

Protesters shield themselves from tear gas fired by the police.

Almost 600 people have been arrested so far, police said this week, for a range of offenses including “taking part in a riot,” unlawful assembly, assaulting police officers, resisting arrest and possession of offensive weapons.

HONG KONG, CHINA - AUGUST 6: Protestors stand off against riot police after a student's arrest at Sham Shui Po district on August 06, 2019 in Hong Kong, China. Pro-democracy protesters have continued rallies against a controversial extradition bill since June 9, when the city was plunged into crisis after waves of demonstrations and several violent clashes. While Hong Kong's Chief Executive Carrie Lam apologized for introducing the bill and declared it "dead," protests have continued to draw large crowds with demands for Lam's resignation and complete withdrawal of the bill. (Photo by Billy H.C. Kwok/Getty Images)

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On Thursday, the United States became the latest country to issue a travel warning for Hong Kong, urging travelers to exercise increased caution over the protests.

“Most have been peaceful, but some have turned confrontational or resulted in violent clashes,” the advisory said. “These demonstrations, which can take place with little or no notice, are likely to continue.”