The South East Antrim UDA has been blamed by the PSNI following a night of "reckless" disorder in Larne, during which officers were attacked and bins were set alight.
A crowd of up to 40 people hurled bricks, bottles and fireworks at police on Wednesday night.
The masked gang set fire to a number of wheelie bins which were being used as a burning barricade to block the Linn Road area.
The Fire Service extinguished the blaze, which threatened to spread to a nearby wooded area.
Four cars were driven around the area at speed throughout the course of the violence.
A petrol bomb was also thrown at police but failed to ignite.
Superintendent Darrin Jones said: “At one point, a police landrover positioned itself to be the focus of incoming missiles - in order to protect other vehicles belonging to members of the public which were unable to turn and leave the area."
Police were able to bring order to the area just before 1am.
Three claw hammers and a number of bricks that had been stockpiled to use as missiles were recovered from the scene.
Superintendent Darrin Jones said: “This was a reckless and totally unacceptable night of violence that posed serious danger to members of the public, police officers – and indeed those who were taking part in it.
“I would urge the community in Larne to reject these people who last night caused such fear and distress to local residents.
"I want to reassure the people of Larne that we are taking what happened last night very seriously and are committed to bringing those responsible before the courts."
Anyone with information is asked to contact police on 101, or to call Crimestoppers anonymously on 0800 555 111.