Dutch retailer Jumbo has secured access to the books of takeover target and local peer Super de Boer.

Jumbo confirmed to just-food today (1 October) that it had started going through due diligence on the business yesterday.

Jumbo has won exclusive talks with Super de Boer's majority owner Casino, the French retail giant, for the next three weeks. However, the company refused to comment further.

Privately-owned Jumbo made a EUR480m (US$699m) offer for Super de Boer two weeks ago.

Reports in the Netherlands have claimed a rival approach could emerge from potential suitors Schuitema and Sperwer Group.

Schuitema, which runs the C1000 chain and which was linked to a possible purchasing venture with Super de Boer earlier this year, could not be reached for immediate comment.

Directors authorised to speak to the media at Sperwer Group, which runs the Plus chain in the Netherlands, were not immediately available.

A Super de Boer spokesperson said there was "no new information" to announce.