Columbus Blue Jackets goalie Matiss Kivlenieks has died at the age of 24 after a “tragic accident” during Independence Day celebrations in the United States, according to the NHL team. Kivlenieks and several others were in a hot tub when a nearby mortar-style firework tipped and started firing toward them, according to police in Novi, Mich. The Oakland County Medical Examiner’s said Kivlenieks died of chest trauma from a fireworks mortar, the AP reports.