COPS are hunting for a “masked man” who reportedly released gas on trams full of passengers. Tram users were left scared ...

Louisiana plans to use nitrogen gas to execute death row inmate Jessie Hoffman next week. Here's what to know about the ...

They also said the method, which involves an industrial, full-face mask ... forced to breathe pure nitrogen gas through a ...

“The mask is a continuous-flow, full face, supplied air respirator with head straps," the protocol states. Prison officials will turn on the nitrogen hypoxia system and either allow the gas to ...

officials had earlier said Hoffman would be strapped to a gurney before a full-face respirator mask fitted tightly on him. Pure nitrogen gas was then pumped into the mask, forcing him to breathe ...