An investigation is under way after the owners of a prizewinning Irish setter who died after competing at the renowned Crufts dog show claimed on Sunday their dog had been poisoned at the British event.

Thendara Satisfaction, who was known as Jagger and was almost four years old, won second in his class at the show in the English city of Birmingham on Thursday.

The dog die dafter returning home to Belgium, 26 hours after leaving the event, a spokeswoman for Crufts operator The Kennel Club said.