US authorities are investigating after a video that surfaced on social media showing a man who appears to be Colorado Rockies hitting coach Hensley Meulens sitting in the pilot’s seat “at cruise altitude” while bound for Toronto. The Instagram post, which has been taken down, included a caption that said “the captain and the first officer” of a United Airlines charter flight had allowed the poster to sit in the cockpit during the flight from Denver.

In a statement, United confirmed the video appears to be taken from an April 10 charter flight from Denver to Toronto and may have shown “an unauthorized person in the flight deck at cruise altitude while the autopilot was engaged.”

The airline also says it is “disturbed” by the content of the video and has taken the pilots who were allegedly involved out of service.

“As a clear violation of our safety and operational policies, we’ve reported the incident to the FAA and have withheld the pilots from service while we conduct an investigation,” United says.

The Rockies were in Toronto to play the Blue Jays in a three-game series between April 12 and 14.

The Major League Baseball team did not immediately return a request for comment.

US regulations say no one can be admitted to the flight deck of an aircraft unless the person is a crew member, an authorized inspector, a certified individual advantageous for safe operations or someone who has the pilot’s permission in emergencies “in the interest of safety.”

A statement from the Federal Aviation Administration says an investigation is underway but it will not comment further while the process is ongoing.