Almost two dozen works of art, including a Robert Ballagh piece, are still missing from Leinster House almost three years after they were first reported as lost, the "Sunday Independent" can reveal.

There are concerns that some may have been stolen. It is feared that others may have been moved amid the upheaval within Leinster House following the largest ever changeover of TDs following the 2011 General Election.

An official investigation as to the status of the missing artworks remains ongoing, according to the Office of Public Works (OPW), which has responsibility for managing the collection of more than 720 works of art.