A 15-year-old boy has been arrested in connection with a violent robbery in Bedford on Sunday night.
It happened at around 10pm when the attackers threatened a man with a knife before stealing his bag.
The victim suffered serious but non-life threatening injuries and was taken to hospital for treatment.
Officers were first called following reports of a man being attacked next to the bus station in Allhallows, at around 10pm.
The victim described his attackers as a group of black and Asian males, in their teens or early 20s.
One was wearing a green Puffa jacket.
Detective Constable David Gordon, investigating, said: “This was a vicious attack and left the victim with some nasty injuries.
“If anyone was in the area and saw anything around this time that can help with our enquiries, I would urge them to get in touch.”
Anyone with any information can contact the force through its online reporting centre or by calling 101, quoting reference 389 of 2 December.
Alternatively you can contact Crimestoppers, anonymously, on 0800 555 111.
The youth arrested has been released under investigation.