A woman was attacked by another female as she waited for a bus in Dumfries just after 5pm on Monday.
Police are appealing for witnesses to the assault, which took place at Burns Statue in the town.
The attack only stopped when another woman intervened and told the suspect to leave the victim alone.
The 26-year-old who was set upon, needed treatment for minor injuries at Dumfries Infirmary.
Police Constable Martyn McQuillan said: “This assault took place at one of the busiest parts of Dumfries and I would appeal for anyone that witnessed it to come forward and speak to police.
“I am particularly keen to hear from the woman who intervened and stopped the assault.
“At this time, the motive for the attack is unknown, however, we know the attacker called the victim by the wrong name and as such, it may be a case of mistaken identity.”
He said they will be reviewing CCTV in a bid to catch the suspect, who is described as being in her early 20s, five feet eight inches tall, of medium build with long, straight blonde hair.
The attacker was wearing a black Stone Island jacket, dark jeans and black and white trainers.
Anyone with information is asked to contact Police Scotland on 101.