A federal appeals court has ruled that US President Donald Trump's administration cannot deploy the National Guard in Illinois.
The Chicago-based US Court of Appeals for the 7th Circuit also ruled that the force could remain under federal control for now.
The decision partially upheld a lower court ruling on Thursday that blocked the deployment of troops in the Chicago area, which said it was "likely to lead to civil unrest".
Trump has previously sent the National Guard to Los Angeles and Washington DC, arguing troops were needed to crack down on illegal immigration and crime.
With 18 people unaccounted for, the tragedy is "even more devastating than we thought", says a sheriff.
