Police cordoned off a section of Warwick Street on Sunday morning after a man in his 20s was assaulted, resulting in hospital treatment.
Forensic investigators arrived at the scene off St John’s Road to collect evidence and take photographs of the scene, which included photos of blood on the road.
The road remain closed for several hours.
Two men have been arrested on suspicion of causing grievious bodily harm with intent and have been bailed until February 2015 pending further enquiries.
Anyone with information can contact the Isle of Wight Investigation Team by phoning 101. Information can be given anonymously by phoning Crimestoppers on 0800 555 111.