culprit. The modus operandi was very similar to the first two attacks, and resulted in 24 injuries, including several tourists. Yau Tsim Mong district councillor Hau Wing-Cheong noted: "This acid throwing is obviously a challenge to the police. It is an unscrupulous crime. The formal operation of the sky eyes was not supposed to be known by outsiders and the district council had planned to announce it after a meeting on Tuesday." Several detective teams were dispatched from other units, such as the anti-triad unit and blue-beret police. In light of the poor quality of the recorded images, which may turn out to be unusable, councillor Henry Chan Man-Yu called the HK$1.7 million system "a waste of money", and another councillor criticised the government for failing to inform the councillors of the purchasing and tendering process. The attack elicited outraged reactions from several Hong Kong politicians, who noted, like Wing-Cheong that the attack was clearly a direct insult to the police. Legislative Councilor Paul Tse Wai-Chun noted his worry about Hong Kong's reputation for safety, since several tourists had been injured: "We don't want our good name being tarnished overnight by the attacker. Police have to gear up to make an arrest to help regain the confidence of tourists." The government's total bounty for information soon reached HK$900,000, while Donald Tsang called the attacks "cold-blooded and malicious" in a televised broadcast. Meanwhile, local business owners have begun to grow concerned and many now stock water in case of a fourth incident. 6 September 2009 incident An incident unrelated to the mass attacks of the summer occurred the evening of 6 September at Tung Choi Street. A shopkeeper couple (Ah Dee and Tam Chan) were assaulted by a man who had come to recover some HK$300,000 that they owed him for handbag supplies. In the middle of a brief altercation, the man, identified solely as "Tsz", whipped out a bottle and splashed the pair with acid, causing severe injuries to both and minor injuries to nine others. He was captured on the scene, the wife having chased him, shouting, and thus attracting the attention of nearby police officers. Ah Dee had to be transferred to Queen Mary Hospital for emergency skin graft. Others were treated at Kwong Wah Hospital and, except for his wife, discharged later that evening. 9 January 2010 incident On 10 January 2010, Police in Hong Kong arrested