A 12-year-old boy has been attacked outside McDonald's in Longbridge.
Police are appealing for witnesses to the incident, which happened around 4pm on November 30.
It is thought that another boy, around the same age, was involved.
No arrests have been made.
A police spokesman said: "No arrests have been made and enquiries are ongoing.
"Anyone with information can contact police via Live Chat at www.west-midlands.pnn.police.uk between 8am and midnight or call 101 anytime. Quote crime reference number 20BW/283090Z/19."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here