Sen. Elizabeth Warren Elizabeth WarrenDimon: Wealth tax 'almost impossible to do' CNN's Don Lemon: 'Blow up the entire system' remark taken out of context Democrats shoot down talk of expanding Supreme Court MORE (D-Mass.) shared her experience touring an immigration center on Sunday, saying it was a "disturbing picture."

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"It's a disturbing picture. There are children by themselves. I saw a six-month-old baby, little girls, little boys," Warren told reporters.

"There are mothers with their babies, with small children. Family units are together if it's a very small child, but little girls who are 12 years old are taken away from the rest of their families and held separately. Or little boys," she continued. "They're all lying on concrete floors in cages. There's just no other way to describe it."

Today, I'm in McAllen, TX. What I've witnessed here is truly disturbing. People are being held in cages – there's no other way to describe it. There are children by themselves. Mothers with young babies. They have nothing but the clothes on their backs pic.twitter.com/1VuVdLa42T — Elizabeth Warren (@SenWarren) June 24, 2018

Warren, a potential 2020 presidential contender, is one of the latest Democratic lawmakers to visit an immigration detention center.

Several Democratic leaders, including Sen. Jeff Merkley Jeffrey (Jeff) Alan MerkleyThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump, Biden renew push for Latino support Sunday shows - Trump team defends coronavirus response Oregon senator says Trump's blame on 'forest management' for wildfires is 'just a big and devastating lie' MORE (D-Ore.) and members of the media, toured a detention facility in McAllen earlier this week.

Warren's comments come as the administration faces backlash for its handling of migrants illegally crossing the U.S. border.

Critics slammed the administration earlier this week for its "zero tolerance" policy of prosecuting immigrants who illegally cross the border, resulting in the separation of families.

Trump caved in the face of the pressure last week and signed an executive order putting an end to the administration's practice of separating migrant families at the border, which resulted in some 2,000 children being separated from their parents.