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 crowds march in Hong Kong calling for democracy on the anniversary of handover . 511 protesters arrested at illegal sit-in following the march , say police . An annual event , the march is especially charged this year amid a heated political climate . Pro-democracy activists are threatening to `` occupy '' downtown if calls are not heard .