The controversial Bahrain Formula One Grand Prix has been cancelled, after organisers announced they were abandoning plans to stage the rescheduled event in October.

Political unrest in Bahrain means the event will not be staged
The event was originally scheduled to open the F1 season in March, but was dropped due to political unrest in the country.
Then last week, F1's world governing body announced a new date for the Bahrain GP in October, sparking criticism from teams, fans and some administrators.
Now organisers have finally conceded defeat, with the Bahrain International Circuit chairman Zayed R Alzayani issuing a statement saying: "It has been made clear that this fixture cannot progress and we fully respect that decision."
"Bahrain has absolutely no desire to see a race which would further extend the calendar season detract from the enjoyment of F1 for either drivers, teams or supporters," Alzayani said.
We want our role in F1 to be as positive and constructive as it has always been, therefore...we will not pursue the rescheduling of a race this season.
Bahrain International Circuit chairman Zayed R Alzayani
"We want our role in Formula One to continue to be as positive and constructive as it has always been, therefore, in the best interest of the sport, we will not pursue the rescheduling of a race this season."
Formula One chief Bernie Ecclestone had been urged on Thursday to re-examine the decision to restore the race to this year's calendar.
Following assurances by government ministers and organisers that the race could go ahead safely, despite ongoing anti-government protests in the Gulf kingdom, the Bahrain GP was last week given a green light for October.
But the Formula One Teams Association (FOTA) wrote to FIA President Jean Todt, Mr Ecclestone and the Bahraini organisers claiming changes to the F1 calendar would "undermine our scheduled transport plans" and "raise insurance problems".
FOTA also highlighted articles in F1's International Sporting Code, in particular stating that changes to the calendar couldn't be made without the unanimous approval of all the teams.