The Taoiseach has said he "can't comprehend" a video online which mocks the death of Michaela McAreavey.
It appeared to show a crowd singing a derogatory song about the murdered teacher filmed during centenary celebrations in Northern Ireland.
Two men have apologised for their involvement in the video. In a statement, John Bell and Andrew McDade said it was a matter of "deep shame and regret" to have been involved in broadcasting and singing about her murder.
Taoiseach Micheál Martin expressed his disbelief at the video today:
"I was appalled and horrified at that video, and we all remember that horrific murder of Michaela McAreavey. It's beyond comprehension that people could behave in that manner and be so indifferent to the trauma that the family suffered."
