Can you identify these people as part of murder investigation?

We are appealing for four people to contact us as they may have important information as part of our investigation into a murder.

We were called to a report of an attack in Green Lane, Derby, just after 12.30pm on Monday 3 July.

The victim, a man in his 50s, was taken to hospital in a critical condition but died nearly two weeks later.

We are releasing CCTV images of four people we would like to talk to as they may have witnessed what happened in Green Lane and be able to help as part of our investigation.

A man, in his 50s, has been arrested on suspicion of murder and has been bailed pending further enquiries.

If you know any of the four people in the picture, or have any information about what happened, you can contact us, quoting reference number 23*408571, on any of the methods below:

• Website – We have crime reporting tools on our website: use our online contact form
• Facebook – send us a private message to the Derbyshire Constabulary Facebook page
• Twitter – direct message our contact centre via @DerPolContact
• Phone – call us on 101

You can also anonymously contact the independent charity CrimeStoppers, on 0800 555 111, or by visiting the CrimeStoppers website.