Marine arrest: Police given further week to question Maxwell
The Metropolitan Police have been granted another seven days to question a Royal Marine in a terror-related investigation.
His arrest is understood to be connected to the discovery of two arms dumps in County Antrim earlier this year.
These were suspected to be connected to dissident republican paramilitaries.
Meanwhile, police have cordoned off parts of Larne in County Antrim for a second day.
Police are carrying out searches at Town Park, Carnfunnock Country Park and the Inver River areas.
Mr Maxwell, a serving Royal Marine, was taken to a West Country police station in Somerset last Wednesday before being transferred to a London police station last Thursday.
He is being questioned on suspicion of being involved in the preparation for acts of terrorism under Section Five of the Terrorism Act.
Meanwhile, Devon and Cornwall police are to make a decision on Thursday about whether to extend a search for terrorism-related materials into a second weekend.
Officers began searching woodland at Exminster near Exeter last Wednesday.
In March, the PSNI said they had uncovered a "significant terrorist hide" of bomb-making components and explosives at Carnfunnock Country Park.
Among the items recovered were wiring, circuit boards, partially constructed power timer units and a small quantity of explosives.
In May, a second significant arms cache, including an armour-piercing improvised rocket and two anti-personnel mines, was found at Capanagh Forest, near Larne.
Meanwhile, police investigating dissident republican activity have been given five more days to question a 27-year-old man who was arrested on Monday morning in Larne.