A man was left with a fractured eye socket after being attacked during a Drake concert at Manchester Arena.
He was attacked near the main stage at around 9.10pm on Sunday, March 10.
A number of men are reported to have assaulted the victim, who needed surgery.
British Transport Police have released CCTV images of two men they want so speak to in connection with the incident.
A statement read: "BTP officers investigating an assault at the Manchester Arena are today releasing CCTV images.
"The incident happened at 9.10pm on Sunday, March 10, during a Drake concert.
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"A number of men are reported to have attacked a man near the stage. The victim suffered a fractured eye socket and required surgery.
"Officers believe the men in the images may have information that could aid their investigation.
Anyone who recognises the men are asked to contact BTP by texting 61016 or by calling 0800 40 50 40 and quoting reference 1900019188.
Alternatively, call Crimestoppers anonymously on 0800 555 111.
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