approval of the Hong Kong Police Force fell to 22 percent in mid-2019, due to its handling of the protests. At the end of July, 60 percent of respondents in public surveys were dissatisfied with police handling of incidents since June 2019. Nearly 70 percent of Hong Kong citizens believe the police have acted unprofessionally by making indiscriminate arrests and losing self-control. Their role and actions have raised questions about their accountability, the manner in which they wielded their physical force, and their crowd control methods. There have also been allegations of lack of consistency of law enforcement whether through deliberate inaction or poor organisation. Inappropriate use of force Hong Kong police were accused of using excessive and disproportionate force and not following both international safety guidelines and internal protocols while using their weapons. According to Amnesty International, police aimed horizontally while firing, targeting protesters' heads and torsos. Police use of bean bag rounds and rubber bullets allegedly ruptured the eyes of several protesters and the eye of an Indonesian journalist. Police were found to have been using tear gas as an offensive weapon, firing it indoors inside a railway station, using expired tear gas, which could release toxic gases upon combustion, and firing canisters from high-rise buildings. Between June and November 2019, approximately 10,000 volleys of gas had been fired. Chemical residues were found on different public facilities in various neighbourhoods. The use of tear gas sparked public health concerns after a reporter was diagnosed with chloracne in November 2019, though both the environment department and the health department disputed these claims. Several police operations, in particular in Prince Edward station where the Special Tactical Squad (STS) assaulted commuters on a train, were thought by protesters and pro-democrats to have disregarded public safety. Police were accused of using disproportionate force after an officer shot two young protesters with live ammunition in Tsuen Wan and Sai Wan Ho on 1 October 2019 and 11 November 2019 respectively. An off-duty officer shot and injured a 15-year-old boy in Yuen Long on 4 October 2019 when he was assaulted by protesters who accused him of bumping into people with his car. The siege of PolyU, which was described as a "humanitarian crisis" by democrats and medics, prompted the Red Cross and Medecins Sans Frontieres to intervene as the wounded protesters trapped inside ran out of supplies and lacked first-aid care. Police were