The shocking security camera footage can be seen at http://www.facebook.com/phuketwan/posts/434280653278462
It shows the two men attacking travel agent Mrs Smith and her companion Tammee Lee, 42, and the two women walking on without realising a fatal stab wound had been inflicted on Mrs Smith. Ms Lee was also wounded.
The two men ride off on a motorcycle. Soon after, on her holiday walk back to Phuket's Katathani Beach Resort, Mrs Smith collapsed and died in the street.
An arrest warrant was issued yesterday for the men whose identity is known. It is believed both men have criminal records. A 300,000 baht reward has been announced for information leading to their arrest.
By tracing the make of the motorcycle from security footage taken outside the Katathani and in other places nearby in the Phuket beach areas of Kata and Karon, police are contacting the owners of the 29 Honda Dream 100cc motorcycles of that vintage on Phuket.
A media conference scheduled for 1pm today local time at Phuket Police Headquarters is expected to reveal more about progress in the homicide investigation.
Thailand's Prime Minister, Yingluck Shinawatra, has sent the nation's second highest ranking policeman to Phuket to head the police team.
Deputy Police Chief Lieutenant General Pansiri Prapawat told the media and the Phuket region's top police yesterday that crime and ''mafia'' rip-offs involving tourists on Phuket would be obliterated over the next three months to create a Phuket where tourists and residents could feel safe and secure.
A complete network of security cameras all over Phuket will be provided by the national government.