The Trump administration said Thursday that it reunited 57 children under age 5 from the parents it separated them from at the border, a process that was supposed to happen by a Tuesday deadline set by a judge.

A dozen parents who were already deported have yet to be reunited with their children, according to a joint statement from the departments of Homeland Security and Health and Human Services. In total, 46 children under age 5 are still separated from the adults they were taken from at the border and are not eligible for reunification under court order at this time, in some cases because the parent was found to be unsafe or not actually a parent, according to the government.

A judge ordered the government last month to stop splitting up families at the border, which happened with increased frequency under a zero tolerance policy for illegal immigration enacted earlier this year. More than 2,500 kids were taken from their parents so the adults could be prosecuted for illegally crossing the border and, before the court order, the government often declined to put the families back together even after criminal proceedings were completed.