He was found in Kenley Road at around 9pm on December 16.
Police are now appealing for more information about the incident and ask any witnesses or anyone who may be able to help with the investigation to contact them on 07741 685374, quoting reference number 0713685/23).
A spokesperson for Richmond police shared on X: “#Appeal for witnesses / info “A male in his 60’s was found injured and unconscious on Kenley Road, Twickenham, at 21:00hrs on 16/12/23.
“We are searching for any info into the circumstances so please call us on 07741 685374 (ref 0713685/23).
“Our thanks are as always in advance.”