Protesters join hands as they sit along with fellow protesters and a pet dog before being dragged away by the police on a street at Hong Kong's financial Central districtA protester reacts as she is dragged away by policewomen on a street outside HSBC headquarters at Hong Kong's financial Central districtA protester is taken away by police officers after staying overnight, at Hong Kong's financial Central districtProtesters sing while waving mobile phones during an overnight sit-in at a street at Hong Kong's financial Central district