MILAN, May 22 (Reuters) - Carlo Cimbri, the chief executive of Italy's No. 2 insurer UnipolSai, is under investigation for alleged market rigging, an investigative source said on Thursday.
The investigation is part of a probe by Milan prosecutors into the merger of the Bologna-based Unipol group with peer Fondiaria-SAI.
UnipolSai had no immediate comment.
Reporting by Manuela D'Alessandro, editing by Paola Arosio