Gardai are investigating a number of incidents in which gardai have been targeted on social media.
It is understood that individual gardai have been targeted by anti-water charge protesters for their work in policing protests.
Some posts have sought to identify where officers live.
Commissioner O'Sullivan says the incidents are being investigated nationally.
Meanwhile, middle ranking gardai say they’re disappointed by their treatment at the hands of the Garda Commissioner.
The Association of Garda Sergeants and Inspectors is holding its annual conference, where Commissioner Noirin O’Sullivan heard some harsh words from the AGSI President.
The organisation says repeated requests for meetings have been ignored.
Tim Galvin says the Commissioner hasn’t lived up to expectations
