As clashes between law enforcement and protesters have brought nationwide attention to the Delaney Hall immigration facility in Newark, New Jersey, the city threatened Tuesday to expand its lawsuit against the private company that operates the detention center unless city officials are allowed to inspect it.

Gov. Mikie Sherrill (D-NJ) ordered state police to establish a peaceful "protest zone" outside the Newark facility.

Advocates outside protested conditions. Detainees inside have staged a hunger strike. And federal officials called in New Jersey police at the gates.