Webber to quit Formula 1 at the end of 2013

Red Bull Formula One driver Mark Webber of Australia waves from his paddock ahead of the Canadian F1 Grand Prix at the Circuit Gilles Villeneuve in Montreal, June 6, 2013. REUTERS/Christinne Muschi

(Reuters) - Red Bull's Mark Webber will quit Formula One at the end of the season for Porsche's new sportscar programme, the Australian announced on Thursday.

The 36-year-old spent 12 years in Formula One, winning nine races and twice finishing third in the championship.