The cause of the accident is under investigation, according to the release. A spokesman for the task force declined to comment on the condition of the injured soldier.

Joint Task Force North, which includes active and reserve military personnel, is tasked with supporting federal law enforcement agencies in stopping suspected criminal activities “within and along the approaches to the continental United States.”

The Starr County Sheriff’s Office earlier said in a short social media statement that it was assisting with a “downed helicopter incident,” possibly involving four occupants.