Los Angeles County’s largest juvenile detention center has failed a critical inspection, leaving the county in the unprecedented position of having roughly 260 youths locked up in a facility legally required to close by today and nowhere else to put them.

County officials hoped efforts to shore up the diminished number of staff at Los Padrinos Juvenile Hall would allow them to avoid a closure again, but state inspectors, while noting “positive changes,” found the facility still does not meet the minimum standards necessary to stay open, according to the Board of State and Community Corrections, the agency overseeing California’s jails and juvenile halls.