Michelin teams have been summoned to a hearing of Formula One's ruling body in Paris on June 29 to explain their part in the US Grand Prix tyre fiasco.
Team chief Frank Williams said the teams had been accused of performing "acts prejudicial to the interest of the competition".
Tyre
manufacturer Michelin were not summoned but could be invited to appear with the teams; championship leaders Renault, McLaren, Williams, Toyota, Sauber, Red Bull and BAR.
The seven pulled out before the start in Indianapolis on Sunday because of safety concerns about their tyres.
FIA rejected their request for a temporary chicane to be installed before the final banked turn to reduce speeds. The six cars that started the race were all on Bridgestone tyres.
