A Hong Kong court has sentenced the first two people under a tough new Hong Kong national security law, including a man who was given 14 months in prison for wearing a T-shirt with a protest slogan.

A Hong Kong man convicted for wearing a "seditious" T-shirt last year was sentenced to 14 months in jail under the city's new security law that continues to crack down on supporters of anti-government demonstrations.

The convictions of two Hong Kong journalists who led a now-shuttered online news outlet have deepened concerns over the city's press freedom.

Chu Kai-pong, 27, became the first person convicted under Hong Kong’s newly enacted domestic national security law. Chu pleaded guilty to sedition on Monday after being arrested for wearing a T-shirt and mask displaying pro-independence slogans,

A Hong Kong man on Monday pleaded guilty to sedition for wearing a T-shirt with a protest slogan, becoming the first person convicted under the city's new national security law passed in March.

T-shirt with words “Free Hong Kong, liberate Hong Kong, revolution of our times” is first under Article 23 law.

Chu Kai-pong already served a three-month prison term for sedition in January for wearing and keeping in his luggage clothes and flags with protest slogans