Comerica Inc., Detroit, has promoted four first vice presidents to senior vice president.

James M. Garavaglia, with the public affairs division, is responsible for government and community relations, and consumer regulatory compliance.

Anthony J. Magdowski, with the finance division, is a senior portfolio manager for fixed-income securities. Ronald D. Marks, also in finance, manages global market-based funding.

Ernest M. Zarb, head of the regional metropolitan corporate banking division, manages the eastern Oakland County, Mich., loan group.

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