June 16 (Bloomberg) -- Massimo Bertoli, who ran event- driven investing at Och-Ziff Capital Management Group, left the hedge fund, according to a person familiar with the matter.

Bertoli, who was based in London, left with colleague Riccardo La Villa, said the person who asked not to be identified because the information is private.

Jonathan Gasthalter, a spokesman for New York-based Och- Ziff, declined to comment on the departures, which were earlier reported by Reuters. Bertoli couldn’t be reached on his cell phone.

Event-driven funds invest in companies undergoing transactions such as mergers or spinoffs. Och-Ziff manages about $30 billion, according to its website.

--With assistance from Saijel Kishan in New York. Editors: Christian Baumgaertel, Steven Crabill

To contact the reporter on this story: Jesse Westbrook in London at jwestbrook1@bloomberg.net

To contact the editor responsible for this story: Edward Evans at eevans3@bloomberg.net