The homes of Patrick Mahomes and Travis Kelce were burglarized in October, according to local news outlets.
CNN  — 

After recent burglaries at homes of professional athletes – including Kansas City Chiefs stars Patrick Mahomes and Travis Kelce – the NFL, NBA and NHL have warned teams about skilled groups that are increasingly targeting players’ residences for such crimes.

An NFL security bulletin issued Wednesday and obtained by CNN warns that players across multiple sports leagues are being targeted. Perpetrators “appear to exploit team schedules to target athletes’ homes on game days,” and appear to be using public records, social media, media reports and surveillance to gather information on their targets, it says.

The memo recommends that players take certain social media precautions, including not posting activities as they happen, and not posting photos of high-dollar objects such as jewelry, watches or flashy clothing.

It also encourages players to take home security steps, including installing comprehensive systems with cameras, sensors and exterior lights; having solid exterior doors with deadbolt locks and reinforced frames; storing valuable items out of plain sight; and using a trusted house sitter when possible.

“It is important for players to maintain situational awareness, practice social media safety, and implement home security measures to reduce the risk of becoming a target,” the memo reads.

Some groups, the NFL memo says, conduct extensive surveillance, including by making “attempted home deliveries” and “posing as grounds maintenance or joggers in a neighborhood.”

The NFL memo does not provide details about the groups’ identities or give examples of specific burglaries.

NBA league security officials, however, in a Thursday memo obtained by CNN, said they received an FBI briefing that connected many burglaries of athletes’ and high-net-worth peoples’ homes “to transnational South American Theft Groups.”

“These SATGs are reportedly well-organized, sophisticated rings that incorporate advanced techniques and technologies, including pre-surveillance, drones, and signal jamming devices,” stated the NBA memo, which was first reported by The Athletic.

“The FBI reported that, in most of the incidents, the homes were equipped with alarm systems that were not activated,” the NBA memo said. “The FBI also reported that the homes were all unoccupied and, in most cases, no dogs were present.”

Local law enforcement and the FBI are working to identify the perpetrators and determine whether group members were part of a transnational crime syndicate, a source familiar with the investigation told CNN. The FBI on Thursday declined to comment to CNN.

The memos came as concern among law enforcement agencies across the country has grown in recent months over “burglary tourists” – criminals who enter the United States from countries that qualify for visa waivers, allowing a visit of up to 90 days without a traditional tourist visa. When the suspects arrive – most often from South America, prosecutors say – they join sophisticated burglary rings that prey on luxury homes.

The leagues’ memos do not spell out whether the groups they warn about precisely fit the concerns previously expressed by law enforcement agencies about burglary tourists.

The burglaries of Mahomes’ and Kelce’s homes

The Kansas City-area homes of Mahomes and Kelce were burglarized last month, according to local news outlets citing authorities.

One burglary happened early October 6 at a home in Missouri’s Cass County, a report from the county sheriff’s office said. That home belongs to Mahomes, the Chiefs’ quarterback, CNN affiliates KCTV and KSHB reported. Details about what was taken weren’t released.

“Obviously, it’s frustrating, it’s disappointing,” Mahomes said last week when asked about the burglary. “I can’t get into too many of the details because the investigation is still ongoing, but (it’s) obviously something that you don’t want to happen to really anybody but obviously yourself.”

The other burglary happened in eastern Kansas on the evening of October 7, according to a police report obtained by CNN – around the time the Chiefs were hosting the New Orleans Saints for a game aired on “Monday Night Football.” The home was believed to belong to Kelce, KCTV reported. The report, made to police on October 8, indicated $20,000 in cash was stolen and $1,000 worth of damage was done to a rear door.

CNN has reached out to both players and the Chiefs for comment.

The NHL told CNN Friday it has also warned its teams about the security threat to professional athletes’ homes, though there have not been any publicized burglaries targeting hockey players. The NHL declined to share any communication it sent to clubs and the players union.

Burglaries reported at NBA players’ homes

Reports of burglaries at the homes of NBA players have also recently emerged.

The home of Minnesota Timberwolves guard Mike Conley Jr. was burglarized on September 15 while he was attending a Minnesota Vikings game, the Minnesota Star Tribune reported. A “yet-to-be determined amount of jewelry” was stolen, the newspaper reported.

CNN has reached out to Conley, the Timberwolves and police in Medina, Minnesota, for more information and comment.

In an Instagram post on November 3, Milwaukee Bucks forward Bobby Portis said his home had been broken into the night before while he was playing in the Bucks’ home game against the Cleveland Cavaliers.

River Hills, Wisconsin, police have not yet responded to CNN’s request for details about the crime.

“Many of my prized possessions were stolen,” Portis said, and later offered a $40,000 reward for information directly leading to the return of the stolen items.

CNN’s Josh Campbell, Jill Martin and Hanna Park contributed to this report.