The NFL issued a security alert to teams and the players' union on Thursday following recent burglaries involving the homes of Kansas City Chiefs stars Patrick Mahomes and Travis Kelce.
In a memo obtained by The Associated Press and multiple other media outlets, the league says homes of professional athletes across multiple sports have become "increasingly targeted for burglaries by organized and skilled groups."
The NFL and other professional sports leagues received a briefing from the FBI last Friday, a source told ABC News.
Law enforcement officials noted these groups target the homes on days the athletes have games.