A man was left critically injured after an incident in a Huddersfield bar.
The 39-year-old victim suffered a fractured skull and bleed on the brain in the incident in the corridor outside the toilets at the Mavericks bar in King Street.
He is still in hospital 10 days later.
Police are appealing for witnesses to the incident which happened at about 2.20am on Sunday, January 17.
Officers have released images of witnesses they would like to speak to.
Det Con Cath Lowdon, of Kirklees CID, said: “We would like to speak to anyone who was in Mavericks bar that evening and witnessed this incident which left a man with serious injuries.”
"We would like to speak to the people in the photos as we believe they may have witnessed the incident and may be able to help with our enquiries."
Anyone who witnessed the incident is asked to contact Det Con Lowdon at Kirklees CID via 101 quoting reference 13160022648 or call independent charity Crimestoppers anonymously on 0800 555 111.
Maverick’s, which has the motto “drink, dine and dance”, opened in Huddersfield five years ago.
The 80s-themed nightspot has proved popular not just with Maverick’s core target audience of over 25s but also with 18 to 25-year-olds.
In unrelated investigations, police would like to speak to the people pictured in the image gallery below. The people pictured in the images may be witnesses as well as suspects. If you recognise anyone, contact police on 101 quoting the reference number on the image caption.