South Wales Police are investigating an incident which took place at 19:30 hours on Wednesday 19th January 2011 at the junction of Corporation Road and Penhevad Street in Grangetown, Cardiff.
An 18 year old man was assaulted by a group of males, sustaining serious injuries. The victim is currently receiving medical treatment; his condition is not believed to be life threatening.
Five people have been arrested.
Police are appealing for anyone who witnessed the incident or anyone with information to contact Cardiff Bay CID on 029 2052 7420, or 101 quoting the reference number 62110020764
Crimestoppers can be called anonymously on 0800 555111