Deployment of tear fuel inside Kwai Fong station on 11 August was condemned by industry experts, as indoor use could result in a stampede and also the concentrated chemical compounds pose significant health threats devoid of ample ventilation. Undercover officers are actually accused of committing arson:[104] a video clip circulating https://www.theguardian.com/world/2019/sep/09/hong-kong-police-accused-of-violence-against-journalists-covering-protests