On 27 October 2019, the police recklessly fired rounds of tear gas at 11:35 p.m. at the southbound lane of the junction of Argyle Street and Nathan Road in Mong Kok moments before leaving the scene where no protesters were gathering at the time. One tear gas canister exploded in front of a KMB double decker bus (Route 905). Many passengers felt unwell after inhaling the gas and were seen scuttling out of the bus with hands covering their face. The bus driver was seen landing himself on the steering wheel in pain. He was given a gas mask and was later moved to a passenger seat for recovery. The reckless action of the police seriously harmed the drivers and the passengers on the bus and the other cars on the road at the time.