Seattle Mayor, Jenny Durkan, traveled to Tornillo, Texas, on Thursday to protest the Trump administration's  "zero tolerance" policy that is forcibly separating children from their parents  at the border with Mexico.

Jenny Durkan, along with a bipartisan delegation from the U.S. Conference of Mayors, spoke outside of a federal shelter for separated children in Tornillo, Texas on Thursday.

The delegation of mayors was denied access to see the conditions inside the federal shelter.

Earlier this month, Durkan introduced a resolution condemning the immigration crackdown at the Conference of Mayors annual meeting in Boston. Her office says the resolution passed unanimously.

Also on Tuesday, Durkan joined dozens of former U.S. attorneys in calling on U.S. Department of Justice Secretary Jeff Sessions to end the systematic separation of families at the border.

The Trump administration  has been criticized  heavily  over images of children in cages inside U.S. Border Patrol processing stations.

It remains unclear what will happen with the more than 2,300 children separated from their parents at the border in recent weeks. Officials have said they are working to reunite families as soon as possible but have provided no clear answers on how that will happen.