Federal agents arrested two District of Columbia government employees for allegedly pilfering more than $16 million from city coffers, the largest public corruption scandal in the city’s history, authorities said Wednesday.

More than 100 federal and local law enforcement agents executed seven search warrants in D.C. and Maryland, arresting five people, including city employees Harriette Walters, 51, manager of the D.C. Real Property Tax Administration Adjustments Unit, and Diane Gustus, 54, an employee in the department. The three others arrested were friends and family members of the arrested city employees.