(ANSA) - ROME, FEB 7 - A worker is dead due to a suspected explosion on Tuesday at a worksite for the Terzo Valico (Third Pass) Tortona-Genoa high-speed railway, sources said.
    Another worker was injured in the accident, which may have been caused by gas leak during excavation work, at Voltaggio, in the Piedmont province of Alessandria.
    Gaetano Nigro of the Fillea Cgil trade union said the dead worker was a 33-year-old man from Sicily, while the injured man is a 54-year-old.
    Silvia Marchetti of UGL trade union said workplace accidents and deaths are still far too frequent in Italy.
    "We are faced with a full-blown massacre in the workplace that cannot be tolerated," Marchetti said.
    "We call on local and national institutions to implement interventions to intensify checks (on health-and-safety measures).
    "It is also fundamentally important to strengthen training and the culture of safety at work in order to prevent such tragedies". (ANSA).