This article has been updated to include additional details from an indictment.

(NewsNation) — Texas Rangers on Monday arrested a Del Rio Sector border patrol agent accused of assaulting and mistreating a child who was in custody.

The agent, Gustavo Sanchez, is accused of grabbing a child by their shirt collar and refusing to provide them a mat on Oct. 4, 2021, according to an indictment.

Officers arrested Sanchez on a warranted that cited a single charge of “official oppression,” according to a Customs and Border Protection news release.

The agency’s news release did not state the agent’s name or say what specifically he was accused of doing. The Texas Rangers additionally declined to provide further details, citing an “active and ongoing investigation.”

“U.S. Customs and Border Protection is committed to ensuring alleged misconduct involving CBP employees on or off duty, is thoroughly investigated,” Customs and Border Patrol said in a statement. “CBP stresses honor and integrity in every aspect of our mission, and the overwhelming majority of CBP employees perform their duties with honor and distinction, working tirelessly every day to keep our country safe.”