Hong Kong police retrieve fresh trove of petrol bombs from university

A police officer holds a weapon during the "Lest We Forget" anti-government rally in Kowloon in Hong Kong, China.

Police in Hong Kong this week re-entered the campus of a university it besieged for more than 10 days last month, gathering newly discovered chemicals and petrol bombs hoarded by anti-government protesters in the Chinese-ruled city.

Following the dramatic saga - where riot police and more than 1,000 demonstrators transformed Hong Kong’s Polytechnic University campus into a battleground - officers were called to retrieve additional dangerous items found among the debris and stowed in locked areas.