A 55-year-old man who was murdered at a betting shop has been named by police as they warned the public not to approach a suspect they are hunting.
Andrew Iacovou was pronounced dead at the scene of the attack in Morden, south London, on Saturday.
A post-mortem examination gave the cause of death as blunt trauma to the head.
Scotland Yard earlier released two pictures of a man in a baseball cap they want to speak to regarding the incident.
"At this early stage, it appears the deceased was attacked in the shop by a lone male suspect," a police spokesman said.
"It is not known at this time whether any money was taken.
"Members of the public should not approach the man and are advised to contact police immediately."
Officers were called by London Ambulance Service after they found the man seriously injured at the shop in Aberconway Road at around 10.30am on Saturday.
The attack is being investigated by officers from the Homicide & Serious Crime Command.
Anyone with information should call the incident room at Sutton on 020 8721 4005, or Crimestoppers, anonymously, on 0800 555 111.