(Bloomberg) -- Dieter Kiefer, the former head of UBS Group’s wealth management for Western Europe, is one of three former executives that French investigators are seeking to detain for questioning amid allegations the Swiss lender helped clients evade taxes, said a person familiar with the case.

French authorities in January issued arrest warrants for Kiefer, Philippe Wick, formerly in charge of French international clientele, and Olivier Baudry, who managed money placed in Switzerland by French clients, said the person, who asked not to be identified.

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