Prominent Hong Kong democracy activists Joshua Wong, Agnes Chow and Ivan Lam have been given jail sentences for their involvement in mass protests last year.
The trio, all in their twenties, had been found guilty of unlawful assembly.
The pro-democracy movement has been stifled since Beijing introduced a controversial security law with harsh punishments.
But as their offences took place before the law’s enactment, the activists have avoided a potential life sentence.
Wong – aged 24 and Hong Kong’s best-known activist internationally – received a sentence of 13 and a half months in jail, while Chow, 23, and Lam, 26, will be imprisoned for 10 and seven months respectively.
All three were found guilty of organising and taking part in an unauthorised assembly near police headquarters at the start of the pro-democracy protests in June last year.
“The defendants called on protesters to besiege the headquarters and chanted slogans that undermine the police force,” Magistrate Wong Sze-lai was quoted as saying by news agency AFP. “Immediate imprisonment is the only appropriate option.”
Chow is said to have burst into tears when the sentence was read out. Wong shouted “the days ahead will be tough but we will hang in there” as he was led away, according to reports.
In comments posted on Twitter via his lawyers, Wong added: “We’re now joining the battle in prison along with many brave protestors, less visible yet essential in the fight for democracy and freedom for HK.”
Rights group Amnesty International condemned the ruling, saying it was a way for authorities to “send a warning to anyone who dares to openly criticise the government that they could be next”.
“These three activists have been jailed in violation of their rights to freedom of expression and peaceful assembly,” said Amnesty’s Asia-Pacific regional director Yamini Mishra.
UK Foreign Secretary Dominic Raab urged the Hong Kong and Beijing authorities “to end their campaign to stifle opposition”.
“Prosecution decisions must be fair and impartial. Rights and freedoms in Hong Kong must be upheld.”