The attack took place on Convent Road, Carndonagh in Inishowen at around 9.30pm on Friday last.
The elderly victim was rushed to Altnagelvin Hospital where he is being treated for stab wounds which Garda sources said were “life-threatening.”
A 30-year-old man arrested by Gardai close to the scene was understood to have been covered in blood.
The man is being detained at Buncrana Garda Station under Section 4 of the Criminal Justice Act, 1984.
Gardai have appealed to anyone with information about the incident to contact Buncrana Garda Station on 074 – 9320540 or the Garda Confidential Line 1800 666 111.Tags: