A 41-year-old man has been arrested under the Terrorism Act this morning, April 6 in connection with disorder in Larne on March 30.
The suspect was arrested in the Carrickfergus area.
He has been taken to Antrim Serious Crime Suite for questioning.
Meanwhile, later in the afternoon, detectives in Larne arrested a 22-year-old woman on suspicion of attempting to pervert the course of justice.
She is currently assisting police with their inquiries.
A PSNI spokesman said the suspect was detained in the Larne area.
“This relates to disorder in Larne on the evening of Sunday 30 March,” he added.