He rose to prominence as a student leader during the 2014 Umbrella Movement
Wong was accused of participating in an 'unauthorised assembly' last October
The 2019 protest came after the city's new law to ban masks at demonstrations
Hong Kong pro-democracy activist Joshua Wong has been arrested for allegedly participating in an unauthorised assembly last October, according to his social media post.
Mr Wong tweeted on Thursday that he was arrested when he reported to the semi-autonomous Chinese territory's Central Police Station.
He said he was also accused of violating a pre-coronavirus pandemic law banning the wearing of masks in public places on the pretext they obscure identity.
He is expected to leave the police station and address journalists later on Thursday.