Oct 13 (Reuters) - French supermarket chain Casino announced on Friday an extension to access the lock-up agreement relating to the financial restructuring of group.

The deadline is now set to Tuesday at 1800 CET (1600 GMT). Accession to the lock-up agreement is needed to subscribe to the planned 275 million euro ($289 million) capital increase. ($1 = 0.9515 euros) (Reporting by Victor Goury-Laffont, Editing by Louise Heavens)