Deadspin's Tom Ley shared the team's statement: "We are aware of the disturbing actions of an Elite security staff member at Sunday's game. 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."
Elite confirmed it has launched an investigation regarding the matter.
The Chargers have used the San Diego-based security company to patrol games for decades. The city recommended in January 2011 that Elite services maintain its 24-hour security service at Qualcomm Stadium, in addition to its work during Chargers games.
That decision was made after the San Diego Union-Tribune's Jeff McDonald reported in April 2009 that the city of San Diego had reached a deal with Elite through 2035 without accepting other bids. After opening up the bidding process again, the city kept its contract with Elite.