Choking and crying, Hong Kong protesters pinned back on campus

Hong Kong police laid siege to a university on Monday, firing rubber bullets and tear gas to pin back anti-government protesters armed with petrol bombs and other homemade weapons from fleeing amid fears of a bloody crackdown.Dozens, choking on the tear gas, tried to leave the Polytechnic University by breaking through police lines after a night of mayhem in the Chinese-ruled city in which roads were blocked and a bridge was set on fire and a police officer was shot by a bow and arrow.Many prote