In a scene that an immigrant rights group spokesperson described as “barbaric,” some two dozen children with their hands chained were videotaped shuffling single file in the parking garage of the 300 North Los Angeles Federal Building late Friday, apparently in federal custody.

Jorge-Mario Cabrera, communications director for the Coalition for Humane Immigrant Rights Los Angeles, said in an interview Saturday that its attorneys had confirmed details posted with the video describing when and where it was recorded.

The attorneys contacted the children and planned to represent them, Cabrera said, adding the children were not accompanied by their parents and were from Ventura County.

Attorneys for the Rapid Response Network, which CHIRLA created, described the children as “safe,” Cabrera said — though that was of little consolation to him.

“It looks barbaric,” Cabrera said, reacting to the video posted on the social media website Reddit. “These are children, for God’s sake. These are not hardened criminals and I think the Trump administration should be ashamed. We’re in unusual times and under the current circumstances, nothing surprises me anymore, yet it enrages me.”

A spokesman for U.S. Immigration and Customs Enforcement did not immediately respond to an email with detailed questions on the children’s detention. President Donald Trump’s administration has vowed to run the largest deportation effort in American history, with extensive efforts to locate and remove immigrants in the U.S. illegally.

It wasn’t immediately known who shot the video.

It was unclear on Saturday whether the children were part of a group of 10 minors that Customs and Border Protection Commissioner Rodney Scott said in a social media post were found on a cannabis farm in Camarillo on Thursday by federal immigration authorities . Scott said all 10 were illegally in the United States and that eight were at the farm without their parents.

Authorities raided two farms in Ventura County on Thursday, seizing some 200 people.

L.A. Taco, in an Instagram post showing the video from the federal building, said women were also in the group and that they were being led into the building.

Protesters could be heard screaming “…Nazis,” “Shame on you” and “We can hear you, kids.”

The basement of the facility is known as B-18, which was designed as a holding area for small groups of detainees being processed. But immigrant detainees have been packed into the room without sufficient food and water, and their attorneys have not had sufficient access to them, immigrant-rights groups say.