Hong Kong police have arrested protesters on the eve of Chinese President Xi Jinping's visit to the city to commemorate the 20th anniversary of its handover from Britain to China.
The demonstrators had gathered around the Golden Bauhinia statue to express their frustration with what they perceive as Beijing's encroachment on democratic values.
The police said that by climbing up the sculpture and displaying banners, the protesters "endangered their own safety and public safety." Authorities have yet to provide information on expected release times.
Those detained include a handful of young activists who were propelled into the international spotlight during the 2014 Umbrella Movement, when thousands poured into the streets, occupying major commercial areas of Hong Kong for 79 days.
Pro-democracy party Demosisto confirmed that the police picked up at least seven of its members, including Umbrella Movement leaders Nathan Law, Joshua Wong and Agnes Chow.
Law, 23, won a seat on Hong Kong's Legislative Council in September, making him the city's youngest ever legislator.