PORTLAND (AP) – Five African immigrants who were fired from their jobs at one of the nation’s largest pharmacy services corporations have sued their former employer, alleging discrimination and harassment.

The men, who were hired in 2007 as pharmacy technicians at a PharMerica facility in Portland, claim that bias by white co-workers and supervisors created a segregated workplace. The employees say they were fired after they complained about the work environment.

The Portland Press Herald said the lawsuit, filed in U.S. District Court, seeks unspecified compensatory and punitive damages.

PharMerica would not discuss specifics of the lawsuit but said it’s committed to equal employment opportunity and denies the plaintiff’s allegations.