NEW : At least seven people are confirmed dead and 51 injured . NEW : More people are feared trapped in vehicles , police say . Comment: Poor weather and a nearby fireworks display may have been a factor . NEW : Police were also looking into a nearby fireworks display to see if it may have played a role , he said . The crash in Somerset involved 34 vehicles , including heavy trucks .
NEW : At least seven people are confirmed dead and 51 injured . NEW : More people are feared trapped in vehicles , police say . Comment: Poor weather and a nearby fireworks display may have been a factor . NEW : The crash in Somerset involved 34 vehicles , including heavy trucks .