A further 10 people who helped dying fans during the Hillsborough disaster are being sought by investigators.
New images have been released today in a bid to track down those featured so they can assist with the ongoing inquests in the deaths of 96 Liverpool fans at the FA Cup semi-final in 1989.
It is the seventh such appeal since April, which has resulted in 37 of the 81 people sought being identified.
The latest appeal includes 11 images.
Investigators from Operation Resolve, the criminal investigation into Hillsborough that is running parallel to the inquest process, are trying to trace the witnesses on behalf of the coroner Sir John Goldring.
Assistant Commissioner Jon Stoddart, who is in charge of Operation Resolve, said: “The response to our appeal has been phenomenal and I am extremely grateful to the public for their support, especially those who have made contact with us to identify themselves, a relative or friend.
“We would urge the public to look at the latest images that we have released because I think they may be able to identify them too. It is important that we track these potential witnesses down as they could help answer some of the many questions that the families of the 96 still have.
“As I have said previously, what we are doing is unusual and I cannot reiterate the importance of people heeding the warnings and advice issued by the Coroner and the office of the Attorney General. It is important that people do not pass comment on our appeal or any other aspect of the Hillsborough disaster on social media and forums.”
People are asked to visit operationresolve.co.uk to view the gallery of pictures or call 08000 283284 if they can identify anyone featured in the images.