Police investigating an arson attack which left a couple dead have arrested a 57-year-old man.
Lisa McClatchey died in hospital of her injuries
Thomas O'Hare, 33, and 21-year-old Lisa McClatchey were doused in petrol and set on fire last November at their home in Tassagh, near Keady, County Armagh.
They both later died of their injuries in hospital. The man was arrested in Armagh on Monday.
Earlier this month, two of four men wanted for questioning about the attack were discharged from a Dublin hospital.
A PSNI spokeswoman said they would only talk to the two men when "it is deemed they are medically fit".
The men were all being treated for serious burns.
A 24-year-old man questioned about the attack was released on police bail in December.
Another man, a 43-year-old from County Tyrone, appeared in court charged with withholding information in relation to the inquiry.