A man was hospitalised with serious neck injuries after he was glassed in an Ingoldmells pub.
He was hit with a pint glass on April 28 at the Castaways bar on Spa Lane in Ingoldmells at around 8.20pm.
Lincolnshire Police are appealing for witnesses to come forward.
Investigating officers also released a CCTV image of a woman who they believe can help with enquiries.
Anyone with information about the attack can contact police on 101 quoting incident number 378 of April 28.