Five thoroughbred horses have died in a truck crash in the Nueva Gales del Sur Hunter region.
It is understood the broodmares were recently purchased by a large racehorse stud at a major national auction.
Two men also suffered injuries when the truck crashed into a tree about 6.30am on Saturday on the Golden Highway at Jerrys Plains, south of Muswellbrook.
The 62-year-old driver and a 59-year-old passenger were treated at the scene and taken to John Hunter hospital in a serious condition.
The names of the thoroughbreds, which were being carried in a float behind the truck, were not yet known – nor the stud farm involved.
Several international racehorse stud operations have properties in the upper Hunter, including Coolmore, Darley and Arrowfield.
It is understood the broodmares were recently purchased at the Magic Millions national broodmare sale, which concluded on the Gold Coast on Thursday.