Fire engines were called to the site of the collapsed bridge in Genoa early Friday morning after smoke could be seen rising nearby.
It is not clear what may have caused the smoke to rise but there had been concerns about gas lines being exposed after Tuesday’s collapse.
The chance of finding survivors at this stage was slim and the unstable mountains of debris made the search operation dangerous, but rescue workers said they had not given up hope.
Rescue workers in Genoa toiled for a third night in the wreckage of the Morandi bridge, continuing the desperate search for people still missing after the accident, which left at least 39 people dead.
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