By David Hunter and Adam Evans
A 54 year old man arrested in connection with a 1990 bomb attack in Armagh which killed four people has been released pending a report to prosecutors.
Three police officers and a catholic nun lost their lives on the Killylea Road on July 24th.
The suspect was detained at Belfast International airport this morning, and has been questioned at Musgrave police station.
A 55 year old man was questioned last week, and has since been released pending a report to prosecutors.
Constable William Hanson, Reserve Constable Joshua Willis and Reserve Constable David Sterritt were killed in the blast alongside Sister Catherine Dunne.
A landmine located at a culvert on the Killylea Road was detonated on the 24th July 1990.
Another woman was also seriously injured in the blast.
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