Questions have been raised over how US actor Gene Hackman and his wife Betsy Arakawa died, with the situation deemed suspicious, despite no signs of foul play. 

The pair have been found dead with their dog in their New Mexico home.  

Carbon monoxide poisoning has been ruled out. 

The couple's front door was found unlocked, with no signs of forced entry. 

Correspondent Richard Arnold told Mike Hosking the pair's bodies were found in separate rooms. 

He says they'd been rarely seen since they quit Hollywood decades ago. 

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