(ANSA) - ROME, DEC 10 - Following a deadly explosion Monday at an Eni oil depot near Florence, labour unions representing workers at an Eni oil refinery in the Tuscan city of Livorno proclaimed a two-hour strike on Tuesday morning.
    The local chapters of engineering and metalworkers unions Fim, Fiom, Uilm and Rsu also organized a protest that started at 8:30 in front of the refinery in Livorno.
    At least 500 workers participated, the unions said, expressing "shock" for the victims of the blast and their families.
    "This is a silent war that never seems to end and only raises interest after tragedies like this one and rage because it is not possible to die while working", they said.
    The death toll of Monday's explosion at the Eni fuel depot at Calenzano has climbed to four after the bodies of two more victims were found early on Tuesday.
    Another person remains unaccounted for after the blast, in which nine people were injured. (ANSA).