A general view shows the barricades outside the occupied campus of the Baptist University of Hong Kong in Hong Kong, China, November 13, 2019. Anti-government protesters dug in at several university campuses across Hong Kong on Wednesday, setting the stage for further confrontations as police said violence in the Chinese-ruled city had reached a "very dangerous and even deadly level". REUTERS/Thomas Peter

Anti-government protesters scout at a makeshift gate during a standoff with riot police at the Chinese University of Hong Kong, Hong Kong, China November 14, 2019. Protesters - many of them young students - spent much of Wednesday fortifying barricades and stockpiling food and makeshift weapons, as other roving bands of masked protesters disrupted transport and businesses in many areas. REUTERS/Tyrone Siu

An anti-government protester holds a bow as he stay at a makeshift gate during a standoff with riot police at the Chinese University of Hong Kong, Hong Kong, China November 14, 2019. As night fell without more of the large on-campus clashes seen the previous day, protesters manning the barricades and checkpoints around the universities arranged to sleep in shifts to watch for any approaching police. REUTERS/Tyrone Siu

Anti-government protesters scout at a makeshift gate during a standoff with riot police at the Chinese University of Hong Kong, Hong Kong, China November 14, 2019. Demonstrators have been protesting since June about what they see as meddling by Beijing in the freedoms guaranteed under the "one country, two systems" formula put in place when the former British colony returned to Chinese rule in 1997. Allegations of police brutality have fuelled protesters' anger. REUTERS/Tyrone Siu

Anti-government protesters scout at a makeshift gate during a standoff with riot police at the Chinese University of Hong Kong, Hong Kong, China November 14, 2019. Earlier in the day, about 1,000 protesters blocked roads in the Central district at lunchtime. Wearing now-banned face masks and dressed in office wear, they marched and hurled bricks on to roads lined with some of the world's most expensive real estate and luxury flagship stores. REUTERS/Tyrone Siu

Stones are scattered on the road to prevent the police from getting to the occupied campus of the Baptist University in Hong Kong, China, November 13, 2019. At the Chinese University of Hong Kong (CUHK), where multiple people were injured in clashes between riot police and protesters on Tuesday, police accused protesters of running a "weapons factory" making hundreds of petrol bombs that were thrown at officers. REUTERS/Thomas Peter