A woman and two men were arrested in Omagh this morning following street violence.
Police were attacked by a group of 10 stone-throwers at Lisanelly Heights in the Co Tyrone town at 2.40 a.m.
There were reports the group had broken windows in the area and set a car alight.
They attacked police officers with bricks, bottles and other missiles, damaging three police vehicles. No officers were injured and calm was restored at about 5.20 a.m.