The Bahrain Grand Prix has been called off because of anti-government protests in the Gulf kingdom.
The race, due to be staged on 13 March, would have opened the new Formula 1 international motor-racing season, but has been in doubt because of the civil unrest. Instead, the 2011 season will begin with the Australian Grand Prix in Melbourne on 27 March.
Crown Prince Salman bin Hamad Al Khalifa, speaking for the Bahraini government, says: "We must focus on immediate issues of national interest and leave the hosting to a later date."
The race could still be rescheduled, but organisers say no decision had been taken yet. Formula 1 boss Bernie Ecclestone says they wish the Bahraini people well and look forward to being back in Bahrain soon.
The Bahrain GP has been on the Formula 1 calendar every year since 2004.
Demonstrators in the kingdom are demanding that the ruling monarchy gives up its near-absolute control over key policies and positions.
