 Upon expiry of the deadline, the students vandalised school premises, damaged surveillance cameras and set off a fire alarm.The VTC later suspended all classes on the Tiu Keng Leng campus of the HKDI, Youth College and other institutions between 15 and 17 October.The VTC has since released additional CCTV clips after 200 students, amid class suspension, rallied inside the campus to support an online appeal for an indefinite class boycott.