The city of Madison is trying to identify a building that would meet federal standards for temporarily housing unaccompanied children entering the United States at the border with Mexico.

The federal government is looking for 90,000-square feet of leasable space that's immediately available and has adequate security. Mayor Paul Soglin says the city would have no responsibilities for the facility and there appear to be no negatives. The facility would house 150 to 250 children for 30 to 60 days while hearings are held that will determine whether they are placed with family members or friends or deported to their home country.

But Soglin says a search of the area for a building that would fit the bill has been unsuccessful over the past week and he's expressed doubt one could be found.

More than 57,000 unaccompanied minors have arrived at the border since October mainly from Guatemala, El Salvador and Honduras.