The Justice Department sued the state of Illinois and the city of Chicago on Thursday, seeking to block state and local protections for undocumented immigrants that the Trump administration says are impeding federal immigration enforcement efforts.

The federal lawsuit is the first by Trump's Justice Department against states or municipalities that have sanctuary city policies.

Federal officials are asking a judge to bar the Illinois, Chicago, Cook County and the Cook County Sheriff from using local laws that protect migrants to hamper law enforcement.