Animal rights activists disrupted racing at Doncaster on Saturday after a small group of people got onto the track to attempt a sit-down protest.
The 7.55 race was delayed when three people were spotted sat down in the middle of the course at the Yorkshire venue.
The intruders, dressed in pink T-shirts similar to those worn by protesters at the Grand National, appeared to be bound together.
They were approached by Doncaster’s security team who dragged them off the course and under the rail, while another person filmed the incident on a mobile phone.
The race subsequently went ahead without further incident, nine minutes after the official start time.
The meeting was being covered live by Sky Sports Racing when the incident occurred.
Presenter Tony Ennis said: “We can see the protesters, there are three of them. I’m not sure exactly how they got there. That’s the top turn down the side of the course.
“I can see some of the racecourse staff are out there. I can see them in those easy to spot pink t-shirts. It looks like it’s Animal Rising again.”
He continued: “They seem to have their hands tied. There is a big bolt cutter there. The security staff are heading over and they are going to lift them up and try and get them off the track.
“They are using the security officers there to remove the protesters from the racecourse. Obviously they are trespassing on the racecourse.”
Animal Rising later posted footage of the protest on Twitter claiming a group of five had "climbed over fences around the track before entering the course itself."
The race was won by 13-8 favourite Carzola, ridden by Hector Crouch, who said he had found out about the incident “just before we were about to come out. It’s quite annoying. It’s made me late for getting home now”.
A Doncaster Racecourse spokesman said: "We treat any incursion onto the track with the utmost seriousness, and are grateful to our security team who were able to remove the individuals in a swift and efficient manner."
The protest was the latest of a series of interventions by Animal Rising who disrupted the start of the Grand National when a large group attempted to break into the racecourse to stop the race. Police made 118 arrests.
It led to a 14 minute delay while police and security cleared the area before the race went ahead. Another protest took place at Ayr seven days later before the Scottish Grand National.
