The Historical Enquiries Team, which reinvestigates killings from the Troubles, is expected to claim that there may have been security force involvement in the murders of two Catholic men on the outskirts of Londonderry almost 40 years ago.
John Toland (35), married and from Windsor Terrace, Derry, managed the Happy Landing Bar, Eglinton. He was shot there four times by an Ulster Freedom Fighters gang on November 22, 1976.
Three days later James Loughrey (35), married with a family, died from his wounds when he was shot by UFF gunmen outside his home at Greysteel.
Families of both victims are expected to tell a Press conference in Derry that they believe there was security force collusion in both murders and that both killings were carried out by the same gang. They believe the collusion involved serving members of the UDR and RUC.
It's understood the family members will urge a fresh police investigation into both murders.
The families have been given confidential HET reports into the murders and are due to give their reactions to the contents of the reports today.