There's a lot of excitement about next week's US Open Golf Championship at Erin Hills but there are some concerns as well.

A group called Exploit no More held a news conference in Milwaukee.

They essentially sounded a warning about the possible increase in sex trafficking that could coincide with the tournament.

"What's often spoken about is the Super Bowl and how sex trafficking increases around the Super Bowl. Well not just the Super Bowl, but other large sporting events can also have that direct effect of the influence of a lot of guys and a lot of guys who are away from their families," said Jarrett Luckett.

Even when there's no major sporting event, Exploit no More cites FBI statistics showing Milwaukee as one of the leading cities in the country for the recovery of young people who are trafficked.

CBS 58 News has reached out to the FBI for confirmation of that claim.