Detectives are appealing for the victim of an assault in Warrington to get in touch.
A witness reported a man had been assaulted at around 12.20am on 12 April in Knutsford Road near the Co-Op.
The witness reported the incident to the police and officers attended the scene but the victim was not there.
At 2am there was a further report of a street robbery in the same area, where a 22-year-old man was approached by three men and threatened with a knife. The men made off with his belongings.
Police have arrested two men aged 22 and one man aged 27 as part of the enquiries into the robbery.
Detective Sergeant Mark Naylor said: “The assault was seen by a witness but the victim has not reported the incident up to now. The second incident was reported only a few hours later and there is a possibility they could be linked.
“If you were in the area around these times and have dashcam footage or you witnessed anything that may aid our investigation, I’d urge you to contact us.
“I would like to appeal directly to the victim to get in touch to let us know that he is okay and to help us with our ongoing enquiries.
“We also want to speak to anyone who believes they may know who the victim is.”
Anyone with information that may aid detectives with their investigation should call Cheshire Constabulary on 101, quoting IML 371842, give the details via https://cheshire.police.uk/contact/general-enquiries or contact Crimestoppers anonymously on 0800 555 111.