Two men, including one who formerly managed the fleet of school buses used by Boston Public Schools, were arrested Friday on bribery charges.

Michael Muller, 59, of Millbury, and John Colantuoni, 60, of Westwood, were identified as the defendants by U.S. Attorney Leah Foley’s office .

Muller was employed by a transportation company that had a contract with BPS to manage the operations and maintenance of the more than 700 school buses used by the district. Buses were kept in yards owned by the city, and Muller supervised all the employees of the transportation company who worked in the yards, according to prosecutors.

The transportation company was not identified in the court documents. BPS has contracted with Transdev , an $11 billion international company, since 2013. Multiple Lin

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