(Bloomberg) -- Three former Google employees sued the search-engine company for firing them two years ago after they questioned management about a proposed program to work with the Trump administration’s Customs and Border Protection.

The three workers claim they were simply abiding by Google’s “Don’t Be Evil” mandate in opposing a plan to work with agencies responsible for separating children from their parents and caging immigrants.

The breach of contract lawsuit was filed Monday in state court in Santa Clara County, California, according to Laurie Burgess, the lawyer representing former employees: Rebecca Rivers, Sophie Waldman and Paul Duke.

Google didn’t immediately respond to a request for comment.

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