Back in 2012, young Dominique Sarron Lee collapsed with breathing difficulties during a training exercise conducted by the Singapore Armed Forces (SAF).
The 21-year-old national serviceman was taken to the Sungei Gedong Medical Centre before being conveyed to the National University Hospital, where he was pronounced dead. The cause? An allergic reaction to smoke grenades that had been used during the military exercise at Lim Chu Kang's Murai Urban Training Facility. A year after Lee's tragic death, the State Coroner ruled that the young man died from an acute allergic reaction from inhaling zinc chloride fumes, which came from the smoke grenades.