The start of the Randox Grand National was delayed after a number of protestors made their way on to the track at Aintree.
Animal Rising had threatened to disrupt the four-and-a-quarter-mile race and were protesting from early on Saturday morning outside the track.
As the National runners were in the parade ring, a number of protestors breached security fences around the Liverpool venue and ran on to the course.
The horses were sent back to the pre-parade ring, with the race facing an indefinite delay.
