Culture Secretary Andy Burnham has called for the "full disclosure" of evidence surrounding the Hillsborough disaster which claimed the lives of 96 Liverpool football fans.
The fans died in a crush at Hillsborough Stadium in Sheffield after going to see their team play Nottingham Forest in an FA Cup semi-final on April 15 1989.
Mr Burnham was heckled with chants of "justice for the 96" as he spoke during a memorial service at Liverpool's Anfield stadium on Wednesday marking the 20th anniversary of the tragedy.
It was attended by around 30,000 people including fans, Liverpool Football Club players and management as well as the families of the victims, who are calling for a fresh, full inquiry into what happened.
Speaking after the ceremony, Mr Burnham told the BBC: "If there is further information held by public bodies relevant to the tragedy that has not yet been published then it should be.
"I believe now the public interest lies very clearly in full disclosure of all such information, so that the families and others can make their judgment on all the facts."
In another interview he added: "There is obviously a strong sense of justice not done on Merseyside and I've said as such in the run-up to today, this emotional milestone. There are unresolved questions and the country perhaps has heard that more forcibly than it has in recent times."
Everton fan Mr Burnham was introduced to the ceremony by Trevor Hicks, former chairman of the Hillsborough Families Support Group, as a "late addition" to the order of service. The Cabinet minister said he brought a message from Prime Minister Gordon Brown that the victims of the Hillsborough disaster would never be forgotten.
But the crowd interjected, chanting "Justice for the 96", but later applauded when Mr Burnham paid tribute to the families, Liverpool FC and its supporters.
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Mr Hicks, who lost two teenage daughters at Hillsborough, said: "If ever the Government needed proof of our determination to get justice for the 96, they just have to look around this stadium today. They were 96 real people, our kin, our flesh and blood, real people who did not come home from a football game."
