UN calls for 'peaceful resolution' to Hong Kong campus siege The UN urges Hong Kong authorities to seek a "peaceful resolution" to the siege of a campus, while calling on protesters to renounce the use of violence. The siege at PolyU (Hong Kong Polytechnic University) began Sunday with many hundreds of protesters occupying the campus as part of a broader campaign of massive disruption across the territory that began last week. IMAGES AND SOUNDBITES