A pensioner has been arrested by detectives investigating the kidnap and murder of Belfast mother-of-10 Jean McConville.
The 73-year-old man was detained in Dunmurry in greater Belfast.
The abduction, killing and secret burial of Mrs McConville in 1972 is one of the most notorious crimes of the Northern Ireland Troubles.
The police case lay dormant for decades until a flurry of activity this year, with a series of arrests made, the most high-profile being the four-day detention of Sinn Fein President Gerry Adams.
Mr Adams, who vehemently denies involvement, was released pending a report being sent to prosecutors for assessment.
The latest man arrested has been taken to the Police Service of Northern Ireland's (PSNI) serious crime suite in Antrim for questioning.
Mrs McConville was dragged, screaming, away from her children in the Divis flats in west Belfast by a gang of up to 12 men and women after being wrongly accused of informing to the security forces. She was interrogated, shot in the head and then secretly buried - becoming one of the "Disappeared" victims of the Troubles. Her body was found in 2003 on a beach in Louth.