Fiji police are questioning a 10-year-old boy after his six-year-old New Zealand cousin was fatally shot in the city of Lautoka over the weekend.
The three children were playing near a construction site on Saturday night when one of them got hold of a gun, used for shooting wild pigs and goats.
The victim was named by the New Zealand Herald as Auckland's Mohammad Khan, who was visiting the site where a new family home was being built.
A 14-year-old student, another of Mohammad's cousins, is in a critical condition at Lautoka Hospital. He may have been hit by the same bullet that killed Mohammad.
A relative, also called Mohammad Khan, told the paper no adults were present so it was difficult to say what had happened.
"It (the gun) was all locked up and how (it) got into the hands of the other little gentleman and how it happened is yet to be ascertained."
Fiji police say the gun owner is in custody.