Public mourning in Florence after supermarket collapse. Authorities proclaimed Saturday a day of public morning in Florence and the Tuscan region.

Friday's structural collapse at a supermarket under construction has left four people confirmed dead and a fifth person missing feared dead and three more injured. In Florence a minute of silence will be observed at 3 pm local time, when Mayor Dario Nardella will be present outside the cityhall in Piazza della Signoria. The incident has put workplace safety in Italy back in the spotlight.