With classes called off for the semester at a number of Hong Kong universities, students have been using their free time to fortify their campuses.

As pro-democracy protests roll on into their sixth month in Hong Kong, large-scale demonstrations have been staged throughout the city this week though the focal point has shifted out to the suburbs where students have been denying police access to their university campuses.

The situation reached its breaking point on Tuesday night as protesters and police clashed around the campus of the Chinese University of Hong Kong, fighting over control a footbridge with exchanges of tear gas and Molotov cocktails.

Police have maintained that they only want to ensure public safety and prevent protesters from throwing debris onto highways and railroad tracks. In the wake of Tuesday night’s insanity, confrontations have not yet flared up again but protesters are busy preparing themselves, turning their campus into a fortress.