Four men, including the chairman of Saoradh in Londonderry, have appeared in court on charges linked to disorder outside Maghaberry Prison at the weekend.
Police are preparing to deal with a 24-hour protest outside Maghaberry Prison, with the rally arranged in support of dissident prisoners on hunger strike.
A 47-year-old man has died in custody at Maghaberry Prison outside Lisburn, the Northern Ireland Prison Service has confirmed.