These groups have reportedly victimised at least nine athletes in recent months, with criminals searching for jewellery, cash, and designer clothing and accessories.
The FBI said the groups conduct 'physical and technical surveillance' to prepare for the burglaries. They also use social media to identify when athletes will be away from home, such as interstate travel for competitive play.
"While we cannot confirm or deny the existence of any specific investigations, the FBI monitors potential threats and regularly shares information with our law enforcement partners and the private sector to help protect public safety," the FBI said in a statement.
"As always, we ask members of the public to report anything they consider suspicious to law enforcement."
In October, the homes of NFL stars Patrick Mahomes and Travis Kelce were both burglarised. Mike Conley Jr., a guard for the Minnesota Timberwolves in the NBA, experienced a home break-in involving stolen jewellery on 15 September.
Milwaukee Bucks forward Bobby Portis shared an Instagram post in early November, announcing that many of his “prized possessions were stolen” after a robbery while he was interstate.
Dallas Mavericks superstar Luka Doncic appears to be the latest victim, with jewellery valued at more than $30,000 stolen from his home in late December.
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