A 28-year-old man was attacked in Bournemouth whilst out cycling and detectives are looking for witnesses.
The incident happened at around 3.45am on Monday, July 1 along a pathway accessible from Throop Road and adjacent to the A338.
It is alleged the offenders are two men who were on a white and silver motorcycle.
The rider of the motorbike is described as white, skinny build, wearing coloured shorts and a puffa jacket with a white helmet.
A 50-year-old woman was arrested on suspicion of conspiring to cause grevious bodily harm with intent.
Detective Constable Elizabeth Horrex, of Bournemouth and Poole CID, said: "The victim suffered some nasty injuries, and we are investigating the circumstances of how he came to receive them."
More top news
It's looking warm! Holly has the details.
Abby King has seen life-changing results after undergoing weight loss surgery in 2016. Her surgeon says many more people could benefit.
Progress has been made in talks under the chairmanship of the conciliation service Acas.