For the third weekday in a row, public defenders Tuesday staged a walkout from a New York City courthouse to protest the presence of federal immigration authorities who came to arrest immigrants who showed up for court appearances.

But despite growing calls from defense attorneys and elected officials for Immigration and Customs Enforcement to cease making arrests in courthouses, the Office of Court Administration maintains that it cannot legally keep law enforcement out of public courthouses and that the protesting defense attorneys themselves are the ones causing turbulence in courthouse operations.