By Nupur Anand
NEW YORK, Oct 7 (Reuters) - Fifth Third FITB.O CEO Tim Spence said discussions to buy regional bank Comerica CMA.N started a few weeks ago when the latter company's CEO Curtis Farmer called to discuss a deal, Spence told Reuters in an interview on Tuesday.
Fifth Third announced an agreement on Monday to buy Comerica in an all-stock deal valued at $10.9 billion. It was the biggest U.S. bank deal of the year and would create the nation's ninth-largest lender.
(Reporting by Nupur Anand in New York, editing by Lananh Nguyen)
((Nupur.Anand@thomsonreuters.com; +1 646 240 2975;))