Asked if Alstom could go back before the European Commission with a new project regarding Siemens, Poupart-Lafarge replied: "No. There will be no second opportunity."

He added that if the deal was blocked - as has been previously reported by Reuters - Alstom and Siemens would each "go back on their own paths."

"It is likely that the European Commission's teams, its services, will indeed propose to block the deal," he added in an interview released on Tuesday by Le Figaro on its website.

(Reporting by Sudip Kar-Gupta and Jean-Michel Belot; Editing by Inti Landauro)