Police investigating after a 12-year-old football fan's wheelchair was hit by a flare have issued a photo of a man they want to trace.
The flare was thrown from the away section of the Stadium of Light into the lower north stand during Sunderland's home match against Birmingham City on 15 April.
It released a cloud of blue smoke.
The boy, called Charlie, said he did not "feel safe" going back to the same stand.
Northumbria Police said CCTV images showed a man who was in the area at the time.