Former world champion Niki Lauda believes the Formula One authorities need to do something about Lewis Hamilton after the British driver crashed out of the Canadian Grand Prix.
Hamilton collided with McLaren teammate Jenson Button on the eighth lap of the rain-marred race in Montreal, shortly after sending Australian Mark Webber into a spin.
Button went on to secure his first win of the season, passing defending champion Sebastian Vettel on the final lap of an extraordinary, rain-delayed and crash-hit Grand Prix.
The dramatic final lap saw Button eclipse Red Bull pair Vettel, who came second, and Australia's Mark Webber, who grabbed a podium spot with a third-placed finish.
The 31-year-old Englishman drove his McLaren with great courage, speed and judgment after surviving the early collision with teammate and compatriot Hamilton, to emerge triumphant at the conclusion of an unpredictable and sensational race.
Vettel, of Red Bull, had looked sure to win after leading from pole position both before and after a two-hour suspension of the action due to torrential rain, but he buckled under pressure from Button on the final lap.
This enabled Button, who was in last place at one time, to come home in a winning time of four hours, four minutes and 37.037 seconds.
It was the 10th win of his career for the champion of 2009.
"I really don't know what to say, it's been a very emotional three hours or whatever it's been since the start," said Button.
"The incident with Lewis - I couldn't see anything and I've apologised to him. It was really a fight from then on, but I kept on pushing and I managed to get past Seb at the end. Another great win for me and possibly my best."
The incidents came after Hamilton's actions at the Monaco Grand Prix drew criticism and Lauda said it was time for action to be taken against the aggressive-driving former world champion.
"What Hamilton did there goes beyond all boundaries," Lauda told RTL television. "He is completely mad. If the FIA does not punish him, I do not understand the world any more.
"At some point there has to be an end to all the jokes. You cannot drive like this - as it will result in someone getting killed."
Hamilton came off worst when he tried - and failed - to get past his fellow Briton Button, leaving his teammate fuming over the team radio.
"What's he doing?" Button said in the aftermath of the crash to his team back on the pitwall.
"Jenson made a mistake into the corner and I got the run on him," Hamilton told the BBC. "I felt I was halfway up the outside, but he kept moving across - whether or not he saw me I don't know, but then I was in the wall."
Hamilton tried to nurse his damaged car round the track to the pits, but he was told to pull up, park and retire.
Team manager Jonathon Neal said: " We're not the first team to have such an accident and I'm sure we won't be the last."
Hamilton had collided with Red Bull Webber on the first corner after the cars were allowed to race when the safety car pulled in after four laps.
Former world champion Brazilian Emerson Fittipaldi had earlier accused him of being over-aggressive but seven-times champion Michael Schumacher said he believed Hamilton did not deserve punishment for his alleged transgressions in Monaco.