Hong Kong: police say surrender is only option for protesters
Hundreds trapped inside Polytechnic as demonstrators try to break campus siege
Hong Kong police have fought running battles with protesters trying to break a security cordon around a university in the city, firing teargas both at activists trying to escape the besieged campus and at crowds trying to reach it from outside.
Police have said the demonstrators inside Polytechnic University had no option but to come out and surrender.