 "hong kong")
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 weapons and stop them 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, a bridge set on fire and a police officer was shot by a bow and arrow.
Some protesters were arrested, tackled to the ground, as others scrambled and tripped over barricades and
