Police are looking for witnesses following an altercation in Skegness on Sunday May 10.
PC Calley Murray wants to hear from anyone who saw three men in William Way at around 7.15pm.
They are all white men in their 20s, one wearing a blue track top with orange stripes and the other two wearing red tops.
PC Murray would also like to hear from anyone who saw anything suspicious in the Sandbeck Avenue and Richmond Drive areas.
Anyone with information should contact PC Murray by dialling 101 and quoting the incident number. Report crimes anonymously by contacting Crimestoppers on 0800 555 111.