Protesters set fire to the entrance of Hong Kong's Polytechnic University early Monday (local time) to stop riot police from entering the campus.
Inside the university, reported CNN, hundreds of students remained barricaded inside the main building where they have been stockpiling weapons including bows and arrows, and refusing police demands to leave immediately.
It followed a night of violence as students hurled petrol bombs at Hong Kong police, who deployed water cannons and warned that if given no other choice they would use "live rounds."