A woman found injured outside a house in Corby on Tuesday (June 14) had suffered a broken jaw and bruising.
She was discovered by officers called to the scene in Blenheim Walk.
The woman was taken to hospital for treatment, and an investigation started to establish the circumstances that led to her injuries.
Northamptonshire Police’s spokesman said: “Anyone with any information can us using ref number 22000340875.”
A 35-year-old man has been released on police bail pending further enquiries.