The families of six men murdered by the Ulster Volunteer Force have been lobbying MPs to investigate claims of security force collusion.
The six men were shot dead in a country bar in County Down
The men were shot dead in O'Toole's bar, Loughinisland, County Down, on 18 June 1994 as they watched football.
The Loughinisland Justice Group met a cross-party delegation of MPs at Westminster.
It included Conservative NI Secretary David Liddington and Liberal Democrat NI spokesman Lembit Opik.
The other MPs they met included Labour MP Jeremy Corbyn and members of the Northern Ireland Select Committee.
The Loughinisland victims were watching Jack Charlton's Republic of Ireland team beat Italy in the USA World Cup when the loyalist gang burst into the pub and opened fire.
The victims were 34-year-old Adrian Rogan, 39-year-old Eamon Byrne, who was married with four children, his brother-in-law Patsy O'Hare, who was 35 and single, Dan McCreanor, 59, a single farmer, his uncle Barney Green, an 87-year-old retired farmer who was married, and Malcolm Jenkinson, 54, a building contractor who was married with three children.
The families were accompanied to the meetings by Sinn Fein South Down assembly member Caitriona Ruane.
She said the families had waited patiently for justice for 12 years.
"As the years have gone on, the families have began to raise serious questions about the murders and specifically the subsequent investigation into it.
"Sinn Fein will continue to support the families of those murdered at Loughinisland in their campaign for the truth about what happened on that night 12 years ago.
"The British government need to realise that issue will not go away."
Emma Rogan, who was eight when her father, Adrian, a scrap metal collector, was shot dead said: "Six innocent men who did not do anybody wrong in their lives were wiped off the face of the earth because somebody said go and do it.
"We want to know why."