Police said 511 people were arrested at the Chater Road sit-in for unauthorized assembly and obstructing police officers . Huge protest march in Hong Kong calling for democracy on the day of handover . 511 protesters were at illegal sit - in following the march , attacking police . An annual event , the protest is especially charged this year amid a heated political debate . Pro - democracy activists are threatening to ` ` occupy '' downtown if they are not heard .
Huge protest march in Hong Kong calling for democracy on the day of handover . 511 protesters were at illegal sit - in following the march , attacking police . An annual event , the protest is especially charged this year amid a heated political debate . Pro - democracy activists are threatening to ` ` occupy '' downtown if they are not heard .