The development took to five the definitive number of dead in the disaster that occurred after a retaining concrete beam on the top floor of the Esselunga supermarket under construction in Via Mariti gave way, causing the entire structure to collapse.
Three workers were also injured in the accident.
The victims have been named as Luigi Coclite, 60, from Italy, Mohamed Toukabri, 54, from Tunisia and Mohamed El Ferhane, 24, Taoufik Haidar, 45, and Bouzekri Rachimi, 56, all from Morocco.
The injured are aged 37, 48 and 51 and are all from Romania.
The Florence public prosecutor’s office has opened a probe, currently without suspects, into alleged aggravated multiple manslaughter in violation of workplace safety rules and culpable building collapse or partial collapse.
Investigations are also underway amid claims that some of the foreign workers were undocumented.
The incident has put the issue of workplace safety in Italy back at the centre of public debate amid expressions of shock and condemnation from politicians, religious authorities and union representatives and pledges of tighter rules.
On Wednesday, Labour Minister Marina Calderone was due to brief cabinet on workplace safety ahead of the presentation of a new package of measures in the coming days.
Unions and workers held demonstrations in many parts of the country.
ANSA
