The U.S. government urged a federal judge on Tuesday to allow the quick deportation of immigrant parents once they are reunited with their children, rejecting a request by a civil rights group that said parents needed time to assess legal options.

The government is facing a Thursday court-ordered deadline to reunite around 2,500 migrant children that officials separated from their parents at the U.S.-Mexican border as part of the Trump administration's "zero tolerance" toward illegal immigration.

President Donald Trump ended the family separation practice in late June after video footage of children sitting in cages and audio of wailing kids sparked international outrage.