E S Group, the company that was contracted to build a concert stage in France for Madonna, is speaking out to ET about the structure's collapse which claimed the lives of two men and injured eight others.

"We were incredibly saddened by the tragic accident during the construction of a stage at the Velodrome at Marseille," a company rep tells ET.

"Our thoughts at this current time go out to the families and loved ones of the two men who died and to those who have been injured. Two of our Directors have flown out to Marseille to visit the injured and to get a better understanding of what caused the accident.

"At present, it would not be appropriate to speculate on potential causes of the accident, but we are working closely with the French authorities to investigate what caused this incident. This is normal practice for such an incident and we will provide a further update as soon as it is possible."

Prosecutors have opened a manslaughter investigation into the stage collapse.