A man suffered a broken jaw and broken teeth in a fight which happened in New Road, Netherton, at around 4.45pm on Monday, May 2.
Police have release images of five men who they believe may have information on what happened.
A spokesperson for Dudley Police said: "We think the men have vital information as to what happened.
"Think you can help? Use Live Chat on our site quoting 20/429307/22."