Update Nov 15, 8.25am: Jason Byrne has been found safe and well.
Gardaí in Dublin say they have serious concerns for the well being of a missing man.
37-year-old Jason Byrne was last seen at around 1.45pm today at Wytheville Road, Ballybrack.
He is described as being 6 foot in height, of thin build and has dark receding hair.
When last seen Jason was wearing a dark navy top and dark blue jeans.