Details of suspected state agent involvement in the Fox and McKearney murders emerged during recent inquest hearings.
On Friday a coroner warned that he cannot continue with an inquest into the four murders as it emerged that the Northern Ireland Office and MI5 havd objected to intelligence linked to the case being made public.
In February it emerged that former UVF commander Robin ‘The Jackal Jackson had been identified by MI5 as a suspect in the murders of Kevin and Jack McKearney in January 1992.
A former member of the UDR and suspected state agent, he is believed to have been involved in dozens of sectarian killings over more than 20 years.
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During the same hearing a lawyer said other alleged state agents linked to the case include former UVF boss Billy Wright.
At an inquest hearing last month it emerged that Jackson had complained to the UVF about Wright in 1993, accusing him of also being a state agent.
Jackson also referred to Wright’s close associate Mark ‘Swinger’ Fulton, who is believed to have been involved in numerous sectarian killings.
Another suspected state agent, Mid Ulster loyalist Alan Oliver, has also been linked via the inquest to the murders of Charles and Tess Fox in September 1992.
Oliver has been connected to several sectarian killings, including a gun attack on a mobile shop in the Drumbeg estate in Craigavon in 1991, which claimed the lives of Eileen Duffy (19), Katrina Rennie (16) and Brian Frizzell (29).
Members of the UDR have also been linked to the Fox killings while during one hearing the coroner heard it has also been suggested “that a source within security forces provided the Lisburn/Mid Ulster UVF with targeting information”.