IndyCar series champion Ryan Hunter-Reay passed Takuma Sato for the lead with 53 laps remaining and roared to victory at the Milwaukee Mile on Saturday. Hunter-Reay won for the second straight year at Milwaukee, continuing the Andretti Autosport team's dominance at the circuit. Michael Andretti's drivers have won five of the last nine races here, and his son Marco had started from pole position this weekend. Hunter-Reay crossed the finish line 4.8 seconds ahead of Brazilian Helio Castroneves, the current points leader.

By Alan Baldwin LONDON (Reuters) - Triple Formula One world champion Sebastian Vettel will race for Red Bull until the end of 2015 after the team announced on Tuesday he had extended his contract by a further year. The 25-year-old German has won the last three championships and is leading the current one by a hefty 36 points after seven races and his latest display of dominance at the weekend in Canada.

Sebastian Vettel is a long way from his peak and is still improving as both a competitor and driver, his Red Bull team chief Christian Horner declared following the defending triple world champion's commanding victory in the Canadian Grand Prix. As the dust settled in the aftermath of an eventful race dominated by the 25-year-old German but over-shadowed by the death of a track marshal, Horner gave a stark warning to his rivals. "He (Vettel) is continuing to get stronger, continuing to get better," Horner said.

A 38-year-old marshal at the Canadian Grand Prix was killed Sunday in an accident involving a crane after the end of the Formula One race, organizers and the International Automobile Federation said. The accident occurred as workers attempted to remove the Sauber driven by Esteban Gutierrez, who had been forced to abandon the race. As workers used a mobile crane to lift the vehicle and return it to the pits, one worker, who was not immediately identified by officials, dropped his radio and attempted to pick it up.