Formula 1 and the FIA have confirmed that members of the public attempted to enter the race track during the first lap of the British Grand Prix.
Northamptonshire police had warned of "credible" evidence that a protest had been planned ahead of the weekend.
It has transpired that people had made an attempt to gain access to the live race track at Silverstone during the first lap of the race, which was red-flagged for a serious incident at turn one.
An FIA statement read: "We confirm that after the red flag, several people attempted to enter the track.
"These people were immediately removed and the matter is now being dealt with by the local authorities."
British GP red-flagged with Zhou flipped
Guanyu Zhou was stretchered away from the first corner incident after flipping into the barriers on the outside of Abbey.
The Alfa Romeo was tipped upside down by George Russell after the Mercedes driver made contact with Pierre Gasly.
Esteban Ocon and Alex Albon were also involved, with the FIA confirming Zhou was conscious after the accident before being taken to the medical centre.