Northern Ireland First Minister Peter Robinson has said any police investigation into Bloody Sunday 40 years ago must include the role of Martin McGuinness.
The DUP leader was speaking after police confirmed they would be launching a murder investigation into the deaths of 13 people shot by British soldiers in 1972.
The move comes after the PSNI reviewed the findings of the Saville Inquiry.
The findings held that no warning had been given to the innocent victims before paratroopers opened fire.
Another of the inquiry's findings was that Deputy First Minister McGuinness was present at the time of the violence.
It said he was "probably armed with a sub-machine gun" but did not engage in "any activity that provided any of the soldiers with any justification for opening fire".
Mr Robinson said: "How could you avoid an inquiry into that and say that we're going to have an inquiry into the Army personnel that were there?"
Commenting today Mr McGuinness said: "Lord Saville was very clear in his report into Bloody Sunday that the IRA had no responsibility for what happened on that day."
He continued, "I consider comments from unionist politicians today in the wake of the decision of the PSNI to investigate the events of Bloody Sunday as an attempt to divert attention away from the actions of the Parachute Regiment on that day."
Mr McGuinness said "It is clear that they do not want to see the Paras investigated for murder."
He said, "I will continue to stand with the Bloody Sunday families as I have done since 1972 in their quest for justice."
