Fire brigade officials said the explosion also sparked a fire. A rescue operation is under way in the hope survivors can be found.
Four bodies have been recovered following an explosion at a power plant next to a dam in Italy.
Sky News’ Italian branch reported five others were injured in the blast and another three are missing. Three workers were unharmed.
Fire brigade officials said the explosion occurred at around 3pm (1pm in the UK) at the dam on Lake Suviana – one of three artificial lakes that feed the power station – in Bargi, near Bologna and Florence.
Utility group Enel said a fire had also broken out at the hydroelectric power plant.
A spokesperson added that the dam basin had not been damaged.
