Police are hunting for two men after gas was released on a Tube train in central London today, causing passengers to cough and struggle to breathe.
A number of people were treated at the scene at Oxford Circus by paramedics for coughing and lack of breath.
British Transport Police said there were no further concerns for their health and their symptoms “would suggest the gas is CS gas”.
CS gas is the main component of tear gas, which is commonly used by police forces for riot control.
Officers hunting for the perpetrators have released CCTV images of two young white men they want to trace after the incident, which was reported at 9.13am.
Social media users described people “coughing” and “crying” after a gas went through their Victoria Line train’s carriage.
Renae Brown tweeted: “Got off at Oxford Circus about 20 mins ago because a gas of some sort went through the carriage and made everyone start coughing/crying. We’re okay now but do you have an update about what it was??”
Kate Howarth added: “Pretty scary experience on the Victoria Line this morning. Some sort of chemical let off and everyone on the tube started coughing uncontrollably.”
Michael Roberts wrote: ”Just before Oxford Circus some kind of non smelling non-visible gas entered the carriage causing passengers to choke.”
Anyone who witnessed the incident, or who knows the identity of the men, is asked to contact BTP by texting 61016 or by calling 0800 40 50 40 quoting reference 171 of 20/07/19.