UPDATE 7-Hong Kong campus protesters fire arrows as unrest spreads across Kowloon

Hong Kong protesters shot bows and arrows and hurled petrol bombs from a barricaded university on Sunday and police fired volleys of tear gas and blue liquid from water cannon as unrest spread across the Kowloon peninsula.Several protesters fired arrows from rooftops at the Hong Kong Polytechnic University amid some of the most dramatic scenes in over five months of anti-government demonstrations in the Chinese-ruled city.