Gardai investigating the murder of Kenneth O'Brien are searching for the gun used in his killing.

The Irish Independent are reporting that a post mortem examination has revealed that he was shot in the head - before his body was dismembered over a week ago.

DNA analysis last night confirmed that body parts found in the Grand Canal at Sallins, belonged to the 33 year old Dubliner.

Gardai are appealing to anyone who may have seen anything suspicious along the Grand Canal in the area to contact them.