Judges in Hong Kong sentenced on Friday the first person convicted under the controversial national security law in a watershed ruling that will have long-term implications for the city's judicial landscape.

The legislation was passed as part of a prolonged government clampdown on Hong Kong's mass pro-democracy movement. But critics argue that the measure has been used to restrict civil liberties.

Former waiter Tong Ying-kit will face nine years in prison for terrorist activities and inciting secession.

The 24-year-old was accused of driving his motorcycle into three riot police last year while carrying a flag with the protest slogan, "Liberate Hong Kong. Revolution of our times."

Judges decided this week that the act was "capable of inciting others to commit secession."

Hong Kong probes Olympics China anthem booing

Meanwhile, Hong Kong police said on Friday that they are investigating another incident of dissent. They said they fielded complaints that some fans had booed China's national anthem during a public screening of an Olympic award ceremony.

Since June 2020, disrespecting China's national anthem and flag has been criminalized by law in the semi-autonomous territory.

More than 100 people gathered briefly on Monday night in a shopping mall to watch a screening of Hong Kong's Cheung Ka Long claiming the Olympic men's individual fencing title.

At the subsequent medal ceremony, some fans initially booed China's national anthem and then chanted "We are Hong Kong."

"The police have launched an investigation into the incident and will collect relevant evidence," police told news agency Reuters in a statement.

A senior police source told news agency AFP that the investigation would cover "any insulting acts" toward the national anthem.

Anyone found guilty of misusing or insulting the anthem could be jailed for up to three years and fined.

A history of booing the Chinese anthem

"We are Hong Kong" is often chanted by Hong Kong football fans, many of whom revel in the city's unique identity and Cantonese culture.

It was often chanted by football fans when China's national anthem played ahead of matches.

Officials have singled out football fans as one of the reasons for passing the law banning disrespecting China's anthem and flag.

kmm/sri (Reuters, AFP)