The British Horseracing Authority (BHA) has said it is looking into the deaths of three horses at Hexham racecourse on Tuesday.
Skywards Reward, Flemerina and Nelly La Rue died in separate incidents in two separate races.
The manager of Hexham racecourse said their sympathies go out to all involved.
The BHA confirmed it is looking into the deaths but said that Hexham has a good course and also has a low fatality rate, 'well below' the 0.4% national average.
They added that these deaths were an exceptionally rare occurrence.