A young woman and a man have been stabbed in Lincoln on Monday night.
The incident happened outside an address on Arboretum Avenue and was reported to police just after 8pm on December 8.
A 22-year-old woman was not seriously injured in the incident and sustained a puncture wound to her arm. She has been taken to hospital for treatment.
A 36-year-old man suffered one stab wound to his back and one to his chest. He has been taken to hospital and his injuries are not thought to be life-threatening.
A scene guard has been put in place while investigations are carried out.
Anyone who witnessed the incident is asked to contact Lincolnshire Police on 101 quoting incident 421 of 08/12/2014.
Alternatively contact the independent charity Crimestoppers anonymously on 0800 555 111.