A 40-year-old man was working in an area close to the Premier convenience store in Ballifield Drive, Handsworth, when he was attacked by two men using pieces of wood at about 3pm today.
A woman was also injured in the altercation.
Both sustained minor injuries that did not require treatment.
A 50-year-old Sheffield man has since been arrested on suspicion of grievous bodily harm and remains in custody.
The other suspect fled the scene and enquiries are ongoing to trace him.
Detective Sergeant Andy Shields, who is leading the investigation, said: “We understand that this kind of incident is very disturbing for those who may have witnessed it or live in the local area.
“I would like to offer my reassurance that there is no risk to the wider public as it is my belief that this was a targeted attack.
“As this assault took place when there were a number of young people in the area due to it being the end of the school day, I’m keen to hear from anyone who has mobile phone footage of what happened.
“It may be that you can help us identify the man who left the scene and ensure that we are able to progress our investigation.
“If you were in the area and have mobile phone footage, have caught something on dashcam or have your own CCTV that may help please get in touch.”
Anyone with information about the incident is asked to contact police on 101 quoting Incident number 516 of 20 June.