A 16-year-old girl sexually assaulted, a stun gun used on a boy, a 17-year-old run over by a patrol vehicle: These are just a few of the complaints levied by migrant children against US border authorities in a report published Wednesday.

The report, compiled by the ACLU and the International Human Rights Clinic at the University of Chicago Law School, is based on more than 30,000 pages of records related to complaints of abuse filed by unaccompanied immigrant minors and supporting documents from between 2009 and 2014. The documents were released through a Freedom of Information Act lawsuit.

The migrant children who filed the complaints were in the custody and care of US Customs and Border Protection at the time they were allegedly threatened, assaulted, and sexually abused. Many of the unaccompanied minors came from Mexico, El Salvador, Guatemala, and Honduras.

“These documents provide a glimpse into a federal immigration enforcement system marked by brutality and lawlessness,” said Mitra Ebadolahi, ACLU border litigation project staff attorney. “All human beings deserve to be treated with dignity and respect regardless of their immigration status — and children, in particular, deserve special protection."

CBP denied the accusations in a statement, calling them "unfounded and baseless."