Security video footage shows the two men on a motorbike Thai police are hunting in connection with the killing of an Australian tourist in Phuket.

The suspects were filmed just 20 minutes before Elizabeth Smith was stabbed.

Police say the pair are aged between 20 and 25.

A reward equivalent to 3, 145 U.S. dollars is being offered for information leading to the suspects' arrest.

The body of 60-year-old Elizabeth Smith was returned to Australia on Friday.

She was killed as she tried to fight off attackers in an attempted bag-snatch on Wednesday.

Paul Chapman, Reuters