Link: Parmalat special report
The pair were detained on suspicion of criminal conspiracy and fraudulent bankruptcy. Their father has been under arrest since December when Parmalat revealed a $5bn (£2.64bn) hole in its accounts.
Fifteen people have been arrested to date since the Parmalat scandal broke.
Shortly after news of the company’s collapse, Stefano Tanzi resigned as president of Parma Calcio, a football club owned by Parmalat.
Francesca Tanzi worked in the family’s tourism business, Parmatour.
Fabio Branchi, an accountant who worked for Calisto Tanzi, is currently under house arrest.
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