Sai Yeung Choi Street
The Mong Kok acid attacks (旺角高空投擲腐蝕性液體傷人案) were incidents in 2008, 2009, and 2010 where plastic bottles filled with corrosive liquid (drain cleaner) were thrown onto shoppers on Sai Yeung Choi Street South, Hong Kong, a pedestrian street and popular shopping area. A reward, originally HK$100,000, for information about the perpetrator or perpetrators, was raised to HK$300,000 following the second incident, and cameras were to be installed in the area following the December incident. The third incident occurred the very day the cameras were turned on. The fifth incident happened after Hong Kong government announced its new strategies against the incident.