Animal rights activists cause chaos at Grand National racecourse.

More than 100 people were arrested on suspicion of criminal damage and public nuisance offenses after animal rights activists scaled fences around the perimeter of Aintree racecourse to disrupt the Grand National horse race. The race was delayed as a result and the 39 competing horses were kept in the parade ring. Two horses died in races at Aintree on Saturday, further inflaming matters. The Grand National is regarded as one of the most dangerous horse races in the world because of the size of the fences, and changes were made in 2012 to make the course safer.