The incident happened yesterday morning (Tuesday February 4) at around 6.45am on Morgan Street.
The victim, a man in his 40s, was setting off for work when he was approached by a man in dark clothing. The suspect, who is around 6ft tall, assaulted him and fled in the direction of Gladstone Road.
Police have launched an investigation and are reassuring the public that they believe it is an isolated incident.
Anyone who witnessed the incident or has information that could help the investigation should contact 101, select option 2, and ask for Jeremy Dean quoting reference number 12200019845. You can also email [email protected]
If you wish to remain anonymous, you can pass information to Crimestoppers on 0800 555 111.