Politics disrupts F1 events once more in 2012

Organisers of this weekend’s Canadian grand prix have called off a scheduled "open house" day.

The promoters of the Montreal race had planned to allow spectators to attend the Circuit Gilles-Villeneuve and tour the F1 pit lane for free on Thursday.

La Presse newspaper said the open day has taken place since the early 90s, with 12,000 taking advantage last year. But according to the Canadian newspapers, it has been called off in 2012 due to "security concerns", amid threats made by protesting university students and internet terrorists.