during the three-day meeting, including National runner Hill Sixteen. <\/span><\/p>\nThe BHA says it will analyse the races to understand what caused the deaths.<\/span><\/p>\nMerseyside Police said on Sunday: “Of the 118 arrests, 65 people were taken into custody and are being processed and will be bailed pending further enquiries.<\/span><\/p>\n“They were arrested on suspicion of a number of offences including conspiracy to cause public nuisance, obstructing highways and possession of controlled drugs.”<\/span><\/p>\nThe police added those arrested were “men and women aged between 18 and 66 years old and came from as far as Kent, Southampton, London, Essex, Swansea, Falkirk and Glasgow” to the course in Merseyside.<\/span><\/p>\nClimate and animal rights group Animal Rising, who claimed on social media their supporters entered the track to delay the race, said 42 people were de-arrested, though this was not confirmed by Merseyside Police.<\/span><\/p>\nAnimal charity the RSPCA called on Britain’s horse racing governing body to “review the circumstances of each of the sad deaths at Aintree, so that we never again exit a ‘festival of racing’ with three dead horses”.<\/span><\/p>\nIn a statement, BHA chief executive officer Julie Harrington said: “The BHA and Aintree racecourse will now analyse the races in painstaking detail, as is the case every year, to build on our existing data and help us understand what caused these incidents.”<\/span><\/p>\nShe said improvements in welfare standards has seen the death rate in the sport reduced by a third in 20 years to 0.2% of runners.<\/span><\/p>\nFour horses died at the Aintree meeting last year, including two injured in the Grand National, which is the climax of the annual race meeting.<\/span><\/p>\nThere have been five deaths from 395 runners in the 10 Grand Nationals raced since safety changes were introduced in 2012.<\/span><\/p>\nTwo other horses in this year’s National – Recite A Prayer and Cape Gentleman – were treated on course and taken away by horse ambulance for further assessment.<\/span><\/p>\nTrainer Willie Mullins <\/span>told Racing TV<\/span>