A Hong Kong activist has been detained by plain-clothed police officers near the US consulate.Tony Chung had planned to enter the consulate on Tuesday and claim asylum, the UK-based activist group Friends of Hong Kong said.
He was arrested along with two other former members of a student pro-independence group.
Mr Chung, 19, was the first public figure arrested under a controversial new national security law in July.
He was accused of being involved in an organisation that vowed to fight for an independent Hong Kong and later released on bail, BBC reported.
Hong Kong's national security law, imposed in June, makes secession, subversion of the central government, terrorism or collusion with foreign forces punishable by up to life in prison, BBC reported.
It has been widely condemned across the world, with critics saying it ends freedoms guaranteed for 50 years after British rule ended in Hong Kong in 1997.