Police have issued CCTV images of two men they want to speak to after men were assaulted in a Richmond pub.
Three 19-year-old men and a man in his late 20s were attacked in the incident.
Two of the men were knocked unconscious and suffered broken teeth.
The others also suffered broken teeth and facial injuries.
It happened at the Unicorn Hotel on Saturday, 18 June at around 1.15am.
Police are asking members of the public to get in touch if they recognise the people in the images as they believe they will have information that will help the investigation.
Anyone with any information is asked to email James.Crawford@northyorkshire.police.uk or call North Yorkshire Police on 101, select option 2 and ask for PC James Crawford.
If you wish to remain anonymous, you can pass information to Crimestoppers on 0800 555 111.
Please quote reference number 12220104835 when passing on information.