A security guard was apparently busted masturbating during a San Diego Chargers game on Sunday — just steps away from the team’s cheerleaders.

A video posted on Facebook shows the unidentified guard seemingly pleasuring himself while facing the cheer section at Qualcomm Stadium during the Chargers’ game against the Oakland Raiders.

“So clearly Elite Security nor the San Diego Chargers care that they have a masturbating security guard at the game,” one horrified woman at the game posted. “Several attempts to call both organizations with no concern for the Charger Girls, Chargers fans or kids. So yeah this happened right in front of us yesterday. WARNING INAPPROPRIATE CONTENT!”

Team officials confirmed the “disturbing actions” of the security guard in an email to The Post.

“The Chargers, Elite Security as well as the San Diego Police Department are aware of the disturbing actions of an Elite Security staff member at Sunday’s game,” the statement read. “We apologize to any fans who may have witnessed the incident. Elite Security is currently investigating the incident and has vowed to take immediate and appropriate action.”

Team officials also released a statement from Elite Security, which apologized for the “isolated incident” during Sunday’s game at the stadium, where an average of 57,326 fans have watched NFL games this year, according to ESPN.

“Elite has become aware of the social media post of inappropriate actions of an Elite staff member at Qualcomm Stadium on December 18th,” according to the statement. “Elite has employed thousands of people over the past 21 years, insists on the highest moral standards from our employees and regrets this isolated incident. Elite is currently investigating the incident and has no additional comment at this time.”

Lt. Scott Wahl of the San Diego Police Department confirmed they are investigating the incident, but declined to discuss what charges — if any — the man may face.

“We have just been made aware of the situation through the media,” Wahl wrote in an email to The Post.

A receptionist at the San Diego-based company said officials were unavailable for comment.