Washington:Three lawsuits have been filed by fans who are seeking refunds for the US Grand Prix. Angry and disappointed fans have been lining up outside the Indianapolis Motor Speedway offices after the Formula One race last Sunday was reduced to a complete farce. Only six cars instead of the usual 20 lined up for the race because the governing body of Formula 1, the FIA could not resolve a dispute with Michelin over tyres. All teams using Michelin tyres boycotted the race on safety grounds. The FIA though has gone on the offensive. They've charged the seven teams with brining the game into disrepute. Renault, McLaren, Williams, Toyota, Red Bull, Sauber and BAR have all been summoned to appear at an FIA hearing in Paris on June 29.