Investigators probing the murder of a British-Iraqi family in the French Alps have found no link with a Swiss gunman who killed three women last week, a French prosecutor said on Tuesday.

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"In light of the facts and the killer's explanations, there does not seem to be any link between the two cases," Annecy prosecutor Eric Maillaud told AFP.

"Exchanges have taken place, but there is now no reason to go further," he said.

French investigators had asked police in Switzerland for permission to question the gunman, who went on a shooting spree last Wednesday in the Swiss
village of Daillon, in the canton of Valais.

Police in France have been struggling to solve the case of the shootings last year in the Haute-Savoie department, where Saad al-Hilli, his wife Iqbal
and her mother Suhaila al-Allaf were all found dead inside their estate car near Lake Annecy on September 5th, along with a French cyclist who investigators
believe was an innocent bystander.
 
The couple's two young daughters survived the attack, which took place in the village of Chevaline, about 150 kilometres from Daillon.