By Alexander Sazonov and Maciej Martewicz, Bloomberg

Billionaire Zygmunt Solorz is widening attempts to recover a fortune held in Liechtenstein that he claims he was tricked into handing over to his children, in a succession feud tearing apart one of Eastern Europe’s richest families.

Solorz, the media and telecoms baron behind Poland’s Polsat TV channel, asked a US federal court late last month to compel daughter Aleksandra Żak to hand over documents related to the battle. His lawyers believe it may help in the legal fight with his children in several European courts.

Solorz’s empire spans from power utility ZE PAK SA to media and telecommunication giant Cyfrowy Polsat SA. He has a net worth of $2.4 billion, according to the Bloomberg Billionaires Index.

The dispute began at a family

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