The FBI has made a surprise visit to the Indiana headquarters of Rahal Letterman Lanigan Racing, a prominent IndyCar team co-owned by TV legend David Letterman.

Indianapolis 500
INDIANAPOLIS - MAY 30: David Letterman, co-owner of the #15 Rahal-Letterman Argent/Pioneer G Force Honda of Buddy Rice puts the wreath around the neck of Budddy Rice in a makeshift victory lane after winning the rain shortened 88th running of the Indianapolis 500 part of the IRL IndyCar Series on May 30, 2004 at the Indianapolis Motor Speedway in Indianapolis, Indiana. Photo by Robert Laberge/Getty Images

This development has created a stir within the racing world as many speculate the reasons behind the investigation. The raid took place on Wednesday, leaving the future of the team shrouded in uncertainty.

Around 8:30 a.m. local time, FBI agents, along with local police, arrived at the 100,000-square-foot facility in Zionsville, Indiana. This location, situated in a wealthy suburb 25 miles north of Indianapolis, is the base of operations for the team, which competes in the IndyCar series and other racing circuits. Despite the attention drawn by the raid, the FBI has remained silent about the purpose of the investigation, and no details about search warrants or seized materials have been shared.

Per 'Racer,' the FBI reportedly instructed employees to leave their computers and related electronic devices in place, gather their belongings, and exit the facility immediately.

Indianapolis 500
INDIANAPOLIS - MAY 30: Buddy Rice (C) driver of the #15 Argent Letterman Rahal Racing Honda G Force celebrates with team owners David Letterman (L) and Bobby Rahal (R) in a makeshift victory lane in the garage after the race was shortened on lap 180 due to rain during the IRL IndyCar Series 88th running of the Indianapolis 500 on May 30, 2004 at Indianapolis Motor Speedway in Indianapolis, Indiana. Photo by Jonathan Ferrey/Getty Images

Rahal Letterman Lanigan Racing, co-owned by David Letterman — who helmed 'The Late Show with David Letterman' from 1993 through 2015 — also includes Bobby Rahal, a past Indiana 500 champion, and Mike Lanigan, a successful businessman. The team's current drivers include Graham Rahal, Bobby's son, as well as Pietro Fittipaldi and Christian Lundgaard, who race in the competitive IndyCar league.

In a statement to 'Fox 59,' Kathi Lauterbach, vice president of communications, said they "are cooperating fully with investigators. Given that this is an ongoing investigation, we are limited in what information we can share right now, but we intend to provide additional information as soon as we can."

Indianapolis 500
INDIANAPOLIS - MAY 30: David Letterman (L) and Bobby Rahal (R) co-owners of the #15 Rahal-Letterman Argent/Pioneer G Force Honda celebrate in a makeshift victory circle with Buddy Rice, his teammate Roger Yasukawa and the rest of the team after Rice won the rain shortened 88th running of the Indianapolis 500 part of the IRL IndyCar Series on May 30, 2004 at the Indianapolis Motor Speedway in Indianapolis, Indiana. Photo by Robert Laberge/Getty Images

In racing, legal controversies are not unheard of. Currently, former Formula 1 driver Felipe Massa is suing the FIA and other figures for $82 million, alleging a manipulated race result in 2008 that cost him the championship. The outcome of this lawsuit highlights ongoing issues of fairness in motorsports.

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David Letterman, FBI