Senate Minority Leader Chuck Schumer (D-N.Y.) said he saw awful, awful conditions for migrants held at a detention center run by Customs and Border Protection at the U.S.-Mexico border.

On Friday, a dozen Senate Democrats went to see migrant detention centers in McAllen, Texas, to investigate the treatment of undocumented immigrants being held there.

Its awful the conditions these people are placed in, Schumer said at a press conference following their visit to the McAllen Border Patrol Station . He said lawmakers were told 400 people were taken out of the facility the previous day to make things look better. (When asked if people were moved, CBP told HuffPost it does not provide custody numbers as those change daily.)

Facilities like this its just awful, awful, awful to see how these people are being treated, he said.

Lawmakers asked a young boy at the detention center whether he had been able to brush his teeth , in a video Schumer tweeted ahead of the press conference. The boy and a girl sitting beside him both shook their heads no.

This is not acceptable. A child telling us hes not able to even brush his teeth in a facility on our southern border, Schumer tweeted. These are human beings, children, kids, families, fleeing violence. This is not who we are.

Sen. Chris Coons (D-Del.), who was also at the border facility visit, said people held there for days or weeks hadnt been able to reach out to family.

The water theyre drinking here which I tasted is barely drinkable, Coons tweeted .

CBP told HuffPost that it was using its limited resources to give the best care possible to those in custody, particularly children, and added that its short-term holding facilities were not designed to hold vulnerable populations.

One of the migrants at the facility told Coons hed been there for over a month .

Earlier this month, Ocasio-Cortez and other House Democrats also visited migrants in detention centers in Texas. The congresswoman said that women in a CBP facility in El Paso were in cells without water and at least one said officers told her to drink out of the toilet . Ocasio-Cortez condemned the horrifying conditions in the detention centers, later calling them concentration camps .

Trump has dismissed the bad conditions in the government-run facilities, tweeting in early July, If Illegal Immigrants are unhappy with the conditions in the quickly built or refitted detentions centers, just tell them not to come. All problems solved!

Recent reports have detailed the horrific conditions that migrants, including children, experience in detention centers at the U.S.-Mexico border.

The Department of Homeland Securitys Office of the Inspector General released a report earlier this month describing dangerous overcrowding, prolonged detention and health risks to migrants at multiple Border Patrol facilities in South Texas. The report from the agency watchdog included photos of extremely crowded detention centers, with some people sleeping on the concrete floor. One cell with a capacity of 41 people held 88 men, one of whom held a sign against the window to investigators saying, HELP 40 Days Here.