A black Saab, which Gardai and the PSNI believe was used in a spate of burglaries last Friday has been recovered in Dundalk.
A joint investigation is being carried out by the PSNI and An Garda Siochana into the attempted murder of an 83-year-old Aughnacloy (Co. Tyrone) woman Pat Davidson.
Two properties in Tallaght were also searched as part of the investigations.
Detective Inspector Chief John Caldwell with the PSNI told The Ulster Herald: "The investigation is ongoing into this horrific incident and we are following a number of lines of
"Today (Thursday) detectives assisted our colleagues in An Garda Siochana conducted two searches of properties in in the Tallaght area of Dublin. A number of items have been seized for further examination."
He continued: "On Friday evening the black Saab vehicle, which we believe was used by the suspects during the burglaries, was recovered in Dundalk."
The Inspector has also appealed to the public for information about a second vehicle used by the burglars. PSNI chiefs say the car is "possibly a Ford Focus" with a "possibly false" license plate of 06 WX 3613.
Anyone with information is asked to contact the PSNI on 0044 28 8775 2525.