A judge ruled New York City is now in contempt over "grave" conditions at the Rikers Island prison complex, with a federal takeover of the system now seen increasingly as likely in a years-long legal battle.

The judge said the city had placed incarcerated people in “unconstitutional danger” by failing to comply with 18 separate provisions of court orders pertaining to security, staffing, supervision, use of force and the safety of young detainees.