At least 18 people were killed and 62 injured on Saturday after a double-decker bus overturned in Hong Kong.Authorities said 10 of the injured were in critical condition and 15 were seriously wounded, Xinhua reported. Police said the driver was arrested.The accident happened at around 6.15 p.m. when a bus on its way to Tai Po from Shatin racecourse toppled to its left on Tai Po Road, New Territories, destroying a bus station on roadside.Most of the passengers were horse racing fans, as the bus was travelling on a special route for horse racing days.The bus had been running on high speed before the accident, according to some of the passengers.Rescuers cut open the top of the bus to save the passengers trapped inside.Various hospitals have set up emergency support stations to help families of the deceased and each affected family will receive support from social workers, she said.