Hopes of an end to rioting in Belfast were growing after a night which was free from trouble.
On Wednesday east Belfast was quiet, with talks between community representatives gathering pace and an intervention by the power-sharing executive's First Minister Peter Robinson and Deputy First Minister Martin McGuinness to investigate the main interface concerns.
Police chief constable Matt Baggott is due to brief his Policing Board scrutiny committee of public representatives and independent members after three people were shot during the most serious violence in Northern Ireland for years.
Dissident republicans are suspected of firing live rounds which left a press photographer with a leg injury, while two other men suffered bullet wounds amid two nights of violence.
A barrage of petrol bombs, missiles and fireworks was thrown at security force lines on Tuesday night, with two men suffering burn injuries and officers firing dozens of plastic bullets.
A 20-year-old woman has been arrested on suspicion of possessing an offensive weapon and assaulting police.
On Wednesday night police arrested a 22-year-old man from west Belfast in connection with the troubles. A police spokeswoman said he was being questioned in Antrim.
Police said the loyalist paramilitary Ulster Volunteer Force (UVF) had orchestrated the trouble.
Sinn Fein MLA Alex Maskey said hopes were growing of an end to violence.
"There have been intensive discussions ongoing and I would be hopeful that they would bear fruit," he said. "As far as I have heard there's a lot of good stuff going on and I have been optimistic."
