A 64-year-old man was robbed at knife point by a gang of four men at Dudley bus station.
The victim was approached by the men as he waited for a bus, at around 12.30am on Sunday, January 5.
The men produced a knife and and grabbed his phone off him.
He managed to get his phone back, but only after handing over £20 to the perpetrators.
The men then fled the scene.
Police have today (January 16) released CCTV images of four men they wish to speak to about the incident.
Anyone with information should contact police via Live Chat at west-midlands.police.uk between 8am and midnight, or call 101 anytime.
Crimestoppers can be contacted anonymously on 0800 555 111.
Crime reference number 20DY/4595N/20 should be quoted.
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