(ANSA) - ROME, DEC 13 - A second maintenance operation had not started yet when a deadly blast occurred at an Eni oil depot near Florence on Monday, contrary to previous reports, the energy giant said Friday.
    Eni said the "second intervention had been planned that morning but had not physically started and was therefore not ongoing at the time of the explosion".
    Earlier on Friday, investigative sources said that, at the time of a deadly explosion, two separate maintenance operations were ongoing at the facility.
    They said one was taking place at one of 10 platforms, the number 7 next to platform 6 of the site's loading area and concerned a supply line to load oil on tanker trucks.
    The other operation instead was to repair two vapour recovery units - a smaller and a larger one - which were not functioning properly and which were located on platform 6 where the blast occurred, killing three tanker truck drivers, two maintenance workers and injuring nine others, the sources claimed.
    Prosecutors are investigating details involving maintenance work to determine the cause of the blast.
    Petrol, diesel and kerosene was received and stored at the 170,300- square-metre Calenzano facility and then distributed from it. (ANSA).