http://www.sciencemag.org/news/2019/11/violent-campus-clashes-between-protesters-and-police-stir-fears-hong-kong-universities

A protester hurls a lit Molotov cocktail at the police outside Hong Kong Polytechnic University in China, where demonstrations escalated in recent days.

The once-peaceful protests in Hong Kong over the erosion of the territory’s autonomous status within China and delays in expected democratic reforms escalated last week into pitched battles between protesters and police on multiple university campuses. At one site, several senior school officials who are scientists sought to negotiate a truce amid rubber bullets and the haze of tear gas.