PARIS, June 13 (Reuters) - A trio of French businessmen made an offer of 1 billion euros for debt-laden supermarket chain Casino, a source close to the matter told Reuters on Tuesday, confirming reports from French media Challenges and AFP.

Telecoms billionaire Xavier Niel, investment banker Matthieu Pigasse and entrepreneur Moez-Alexandre Zouari last week said they were prepared to invest funds in Casino to find a solution to the group's financial woes after exclusive tie-up talks between Casino and smaller retail rival Teract collapsed.

(Reporting by Juliette Jabkhiro; Editing by Mark Porter)