A man arrested at Heathrow Airport has become the 10th person detained as part of a major operation against dissident republicans in Northern Ireland.
Detectives from the Police Service of Northern Ireland (PSNI) arrested the man on Saturday as part of an investigation into the New IRA.
The 62-year-old, who lives in Scotland, was brought to Belfast for questioning.
A property in the Blackhall area of Edinburgh was also searched by officers from Police Scotland.
The other nine people were arrested last Tuesday and seven of them have been charged so far.
Two men appeared in court in Belfast on Saturday morning to face terrorism-related offences.
A further five people were charged with a range of offences under the Terrorism Act on Saturday evening.
Police said a 32-year-old man from Londonderry and another man, aged 48, have been charged with offences including membership of a proscribed organisation, directing terrorism and two separate charges of preparatory acts of terrorism.
A 45-year-old woman from Dungannon, County Tyrone, and a 49-year-old woman from Lurgan, County Armagh, were charged with similar offences.
A 43-year-old man from the Dungannon area has also been charged with a number of offences including membership of a proscribed organisation, directing terrorism and conspiracy to possess explosives with intent to endanger life.
All five are due to appear before Laganside Magistrates Court in Belfast on Monday.
Operation Arbacia is targeting the New IRA, which is considered to be the largest dissident republican group and has been behind numerous attempted attacks on police officers.
Journalist Lyra McKee was shot dead by a New IRA gunman while observing a riot in Derry on 18 April 2019.