At least three people have died and a dozen are missing following an explosion and fire at a block of flats in Jersey.Jersey Fire and Rescue Service’s Chief Fire Officer, Paul Brown, confirmed they had been called and had carried out investigations on the three-storey building just hours before the huge blast at around 4am on Saturday.At a press conference on Saturday afternoon, Mr Brown said firefighters attended the site in St Helier on Friday night after receiving a call at 8.36pm.