Poland's Robert Kubica left the Circuit Gilles Villeneuve aboard a medical helicopter on Sunday complaining of pain 'all over his body', according to sources in Montreal.

Reports that he broke his leg in the horror shunt are believed to have been based on an in-car radio transmission from race winner Lewis Hamilton's engineer, but the news was not confirmed by the circuit Medical Centre.

Medical Centre officials did however confirm that Kubica emerged from the 280kph smash with 'no internal injuries', and he was due to have x-rays and other checks at the L'Hopital du Sacre-Coeur in downtown Montreal.

The only other information came from Kubica's manager Daniele Morelli, who said in a television interview that Robert spoke "nearly normally" before being airlifted.

Kubica to doctors - 'can I race?'

Robert Kubica's first question to doctors in the Sacre-Coeur hospital on Sunday was: "Can I race in Indianapolis next Sunday?"

Ronald Denis, head of trauma at the downtown hospital and also the Circuit Gilles Villeneuve, confirmed to the Canwest News Service that the Polish driver stayed overnight with minor concussion and a sprained right ankle.

He will have some neurological tests on Monday.

"When I saw the crash on the screen I was very worried; I thought he was dead," Denis admitted. "But when we got there, I was very happy to see he was talking.

"Under the circumstances he is doing very, very well."

BMW-Sauber said on Monday that a decision about whether 22-year-old Kubica will be fit to race in America will be taken at the Indianapolis circuit on Thursday. (GMM)