Law professor Willy Fu Kin-chi said the sentences are a wake-up call to those Hong Kong youngsters who intend to participate in illegal protests.
Lee was arrested later during a dispersal operation against about 100 protesters at the scene. After he was apprehended, police seized five gasoline bombs inside a backpack he had left in an alley. Leung Ho-long and Leung Tsz-long were arrested after damaging turnstiles, ticket vending machines and screens worth HK$230,000 at a light rail station in Tin Shui Wai with four others at about 2 am on Sept 7.
Magistrate Kathie Cheung Kit-yee said the crime was premeditated, as the twins had prepared tools and extra clothes for the plot.