A man is in a critcal condition at John Radcliffe Hospital after a vicious attack in Kettering in the early hours of Sunday.
Police are investigating the serious assault at around 4.30am.
A police spokesman said: “It is believed that the fight started near to the corner of Silver Street and Dryland Street and moved further along Dryland Street towards Gold Street.
“The assault has left one male in a critical condition in John Radcliffe Hospital.”
Police are appealing for any witnesses to the incident and in particular are keen to speak to two men.
The first is a white male, aged early to mid-20s, with short fair hair. He was 5ft 10ins to 6ft tall and of a slim build. At the time he was wearing a light coloured top with dark patched on both elbows, both shoulders and a dark pocket on the front chest area.
The second is a white male, aged 20-25, 5ft 6ins tall and also of a slim build. He was wearing a dark tracksuit top, and a dark coloured baseball cap. He wore dark jeans which had a distinctive white motif on the rear of them.
Anybody with any relevant information please contact Northamptonshire Police control Room on 101 or by dialling 03000 111 222 and quote Operation Hobart.
The police spokesman said: “Although this is a serious incident police wish to reassure those living and visiting Kettering that offences of violence within the Town centre are reduced year on year.”