Mr Jones was discovered in north Belfast, near Elmfield Street
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Detectives investigating a double murder last week linked to dissident republicans have arrested two people.
The man and woman are being held at Antrim Serious Crime Suite.
The body of Edward Burns, 36, - who was shot in the head - was found near the Falls Road and the beaten body of Joe Jones, 38, was discovered in Ardoyne.
Detectives said the killings took place against the backdrop of tension within dissident republicanism.
Mr Burns was the father of five children, while Mr Jones had three.
The body of Mr Jones, from Poleglass, was discovered in north Belfast, near Elmfield Street, at 0800 GMT. He had head injuries.
The body of Mr Burns, from the Ardoyne area, was found early on Monday in a car park off the Falls Road near St Gall's GAA club.