Detectives investigating the serious assault of a man on his doorstep are appealing to two taxi drivers to contact them.
The 60-year-old was confronted by the attacker at his home in Goldie Avenue, Dumfries, at about 21:10 on Friday.
Police said inquiries had revealed that two light-coloured taxis were seen driving along Goldie Avenue, between the hours of 21:00 and 21:10.
Officers believe the taxi drivers may have seen the suspect.
He was about 6ft tall and had a muscular, athletic build and was wearing dark clothes.
The victim did not need hospital treatment. Police said there was no known motive for the attack.
Officers have been carrying out door-to-door inquiries and are checking CCTV footage.
Anyone with information about the assault should contact police.