The Hungarian Formula One Grand Prix in August can only take place without spectators, organisers have said in a statement.

The race at the Hungaroring was scheduled originally for 2 August but Hungary on Thursday said events with more than 500 participants cannot be held until 15 August.

Formula One plans to start its season behind closed doors in Austria from 3-5 July, followed by the British Grand Prix at Silverstone under similar conditions, but has yet to publish a revised calendar.

The traditional August break has been cancelled to allow for rescheduling, with teams currently on an extended factory shutdown that could run into June. 

On Monday, the French Grand Prix became the latest Formula One event to be cancelled due to the coronavirus pandemic.

As the calendar shifts radically, Formula One managing director Ross Brawn has outlined plans for the sport to resume in an isolated environment and suggested it could begin with a double-header at Austria's Red Bull Ring in early July.

Brawn said the sport is drawing up detailed plans to ensure races can be staged safely amid the coronavirus pandemic.

"It's a massive logistical challenge," Brawn said on the official F1 Nation podcast. "Running an F1 race is a big challenge anyway. Running an F1 race in these circumstances is new to all of us.

"We're working our way through all the requirements to make sure we operate in a safe environment for everyone involved in the race."

Earlier this week, F1's chief executive Chase Carey outlined plans to start the season with the Austrian Grand Prix on 5 July and Brawn said the characteristics of Spielberg's Red Bull Ring - located in central Austria two hours south-west of Vienna - meant it could host back-to-back races.

"It's a real consideration because one of the logistical challenges is getting everyone tested and cleared to enter the paddock and enter the racing environment," he said.

"And I think once we do that, it's very attractive to keep everyone in that environment, within that kind of biosphere that we want to create for another race.