Police are looking for a group of men and women in connection with the serious assault of a man in a Spalding nightclub queue.
A 20-year-old man was initially in a critical condition after the attack. He remains in hospital and his injuries are described as serious.
Investigating officers released CCTV pictures of a group they wish to speak to as part of enquiries.
The images are of three women and three men.
Anyone who can identify the people pictured should contact Spalding CID by calling 101.
People can also report completely anonymously via Crimestoppers – either online or by calling 0800 555 111.