Deals of the day- Mergers and acquisitions
(Adds Zimmer, Medtronic, TIM Participações, Comcast, Chiquita, JPMorgan Chase & Co, Fortress and Ilva)
Oct 3 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 2000 GMT on Friday:
** European Union antitrust regulators opened an extensive investigation into U.S. medical device maker Zimmer's bid for Biomet, concerned that the $13.4 billion deal may lead to more expensive orthopaedic products.
** U.S. medical equipment maker Medtronic Inc said it would still buy Covidien Plc but will use $16 billion in debt rather than cash held overseas, reacting to changes made by U.S. tax authorities to cut the benefits of such "inversion deals."
** Brazil's TIM Participações SA has hired Banco Bradesco SA's investment banking unit to analyze a potential bid for rival Grupo Oi SA, a source with knowledge of the situation told Reuters.