Detectives investigating a serious assault in Scarborough are appealing for a potential key witness to come forward.
The incident occurred in Durham Place at around 10pm on Friday.
A 53-year-old man sustained life-threatening injuries and is currently being treated at Scarborough Hospital.
In the meantime, officers need to speak to a man who is known to have walked along Durham Place and into North Marine Road while the incident was ongoing. This man is not suspected of any offences and could be a key witness.
If you can help, please call North Yorkshire Police on 101, select option 2, and ask for the Scarborough Serious Crime Team or email Scarborough&RyedaleSCT@Northyorkshire.pnn.police.uk
Alternatively, pass information to Crimestoppers anonymously on 0800 555111.
Please quote incident number 12170165991 when providing details about this case.
* 31-year-old Stanley Collins was charged with robbery, wounding with intent to cause grievous bodily harm, two counts of possession of an offensive weapon in a public place (hammer and knife), and possession of cannabis.
* 26-year-old Nathan Cammish was charged with robbery and wounding with intent to cause grievous bodily harm.
* 19-year-old man Callum Kail was charged with robbery and wounding with intent to cause grievous bodily harm.
All three appeared at Scarborough Magistrates' Court this morning.
They were remanded in custody and will appear at York Crown Court on Monday October 16.