Voting is taking place in a Newry and Mourne council by-election.
Two candidates are competing for a seat in the Fews district, following the resignation six weeks ago of Sinn Fein councillor Breandan Lewis.
Turlough Murphy, Sinn Fein, is standing against victims' campaigner William Frazer.
The Fews area includes wards such as Newtownhamilton, Camlough, Bessbrook and Donaghmore. Polling centres will be open from 0700 BST until 2200 BST.
The results will be announced on Thursday.