We may see fewer Gardaí on the streets today and response times to emergency calls could be slower.
The Garda Representative Association is escalating its dispute with the Garda Commissioner over rosters.
Rank and file gardaí are withdrawing voluntary overtime - and will continue to do so on every Tuesday in October, with the suggestion of more comprehensive strike action next month.
They're opposed to Commissioner Drew Harris' plans to revert to an old, pre-covid roster on November 6th.
GRA President Brendan O'Connor says there's a simple way to avert the planned action.
'Remove the 6th of November as the day for imposing a roster that doesn't work that has been proven to be not really conducive to the provision of police, just to defer that to allow us breathing space to find a new roster so our members can only change once rather than have to change twice in the foreseeable future. It's not an unreasonable ask.'