With one day remaining before the deadline set by both companies for agreement on the 10 billion euro (7.8 billion pounds) sale of Bouygues Telecom to Orange, key aspects of the deal remain under discussion and may not be concluded by Wednesday, one of the sources said.

Unresolved questions include financial terms and the subsequent sale of Bouygues assets to rivals Iliad and SFR - part of a complex transaction that would reduce the number of French telecoms operators from four to three. Bouygues would also become the second-biggest shareholder in Orange after the French state.

"We've worked a lot this past week-end but there remains certain elements to discuss," one source said.

Orange and Bouygues both declined to comment.

(Reporting by Mathieu Rosemain and Gwenaelle Barzic; Editing by Laurence Frost)

Valeurs citées dans l'article : BOUYGUES, ILIAD, ORANGE SA, Numericable Group