Don't show me this message again✕ Sgt Hillier died on Thursday evening (MOD) Tributes have been paid to the soldier who died after being injured in a firing exercise. Sergeant Gavin Hillier, from the 1st Battalion Welsh Guards, was fatally injured at Castlemartin in Pembrokeshire, Wales on Thursday. A Ministry of Defence (MoD) spokesman said it was confirming the death “with great sadness”, adding: “Our thoughts are with his family and friends at this tragic time. “An investigation is under way and it would be inappropriate to comment further at this stage.” In a Facebook post, Sgt Hillier’s father Mark said he was “heartbroken” and “absolutely devastated”.