A five-year-old boy has been punched in the face by an unknown man while walking in Sydney's inner west.
The attack occurred when the boy and his nine-year-old brother were holding hands with their grandmother while walking along Bridge Road in Glebe about 4.20pm on Tuesday.
The man continued walking along Bridge Road after the attack, NSW Police said.
The child fell to the ground after being struck and sustained bruising to the chin but did not require medical assistance.
His grandmother took the children home before contacting police to report the incident.
Officers have appealed for anyone with information or dashcam vision of the incident to contact them.
The offender was described as having a dark complexion, being about 170cm tall with a thin build and having a long face with a dark beard and short dark hair.
At the time of the incident he was wearing a dark coloured hooded jumper, dark long pants and joggers, police said.
Officers attached to Leichhardt Police Area Command have commenced an investigation and are willing anyone with information to contact Leichhardt Police Station or Crime Stoppers on 188 333 000.
Do you have a story tip? Email: firstname.lastname@example.org.